第1回
字幕なしで聞く
字幕なしで大意、テーマ、主要な情報をつかみます。
🎧 上級英語オーディオ練習
0:00 / 0:00
5回リスニング法
1本のリスニング教材を再利用できる英語インプットに変える
1回聞いて終わりにしないでください。同じエピソードを5回に分けて、まず大意、次に言語面の確認、シャドーイング、ディクテーション、最後に字幕なしで聞き直します。
第2回
英語字幕を見る
知らない語や難しい文を確認します。必要なら辞書や短いメモを使います。
第3回
シャドーイング
1文ずつ繰り返し、発音、リズム、強勢、イントネーションをまねします。
第4回
ディクテーション
聞こえた内容から重要な文をいくつか書き取り、形と構造を鍛えます。
第5回
字幕なしで再聴
文字の助けなしで再度聞き、以前より分かる部分が増えたことを確認します。
トレーニング後
共有して言い換える
メモ、新出語、役立つ概念を共有し、その後で自分の言葉でエピソードを言い換えましょう。
次のステップ
精聴から多聴へ
集中的に学習したエピソードを後で流し聞きに回し、慣れた素材で聞く量を増やしましょう。
第1回第2回第3回第4回第5回
📝 上級英語ダイアログ
Today I want to talk about dwarf galaxies and why astronomers study them. These small galaxies are faint and spread over millions of light years when seen in groups. That faintness makes direct detection of young stars difficult and can make the task seem hopeless at first. Historically some researchers claimed dwarf galaxies were essentially dead and older than larger systems, but that idea has been revised. Over the last decade, new telescopes and image-stacking techniques have revealed signs of ongoing, low-key star formation. The phrase low-key describes a modest, faint level of activity rather than dramatic bursts. In other words, star birth in these systems can be quiet and easy to miss in a single exposure. It is not hopeless, however, because combining many observations boosts the signal. Deep optical surveys and infrared instruments are particularly useful, although a few early papers mistakenly suggested infrared satellites measure radio waves. Those claims were corrected. We now know that careful spectroscopy and long integrations can pick out young stars that were previously invisible. So while the galaxies appear subdued, and their activity is low-key, the prospect for understanding them is bright when one looks over multiple datasets.
📝 📚 上級練習問題
1
What is the main subject of the lecture?
不正解
正解:
B
説明:
Correct: The lecturer focuses on dwarf galaxies and how astronomers detect their star formation. A is wrong because radio telescope calibration is only mentioned indirectly and as an incorrect claim. C is wrong because the Milky Way's history is not the main topic. D is wrong because designing satellites is not discussed; infrared instruments are mentioned but not their design.
2
Why did the lecturer say detection can seem 'hopeless' at first?
不正解
正解:
B
説明:
Correct: The passage explains that faintness and the limits of single exposures make detection seem hopeless. A is wrong because distance and speed are not given as the reason. C is wrong; the lecturer actually notes a mistaken claim about satellites, not that infrared satellites cannot detect stars. D is wrong because lack of models is not mentioned as the cause.
3
Which methods did the lecturer say help reveal ongoing star formation?
不正解
正解:
A
説明:
Correct: The text lists image-stacking, deep optical surveys, infrared instruments, and spectroscopy as useful. B is wrong because single short exposures are said to miss stars; radio mapping is not emphasized. C is wrong because the passage notes that the claim about satellites measuring radio waves was a mistake. D is wrong because manual counting by eye is not presented as an effective method.
4
What does the lecturer imply about earlier views that dwarf galaxies were 'dead'?
不正解
正解:
B
説明:
Correct: The passage says the idea that dwarf galaxies were dead has been revised. A is wrong because the lecturer says the idea was revised, not still accepted. C is wrong because the lecturer implies new data revealed ongoing activity, not confirmation of death. D is wrong because the passage mentions a mistaken claim about satellites and radio waves, not accurate radio measurements supporting the dead-galaxy idea.
5
What inference can be made about the lecturer's attitude toward future research on dwarf galaxies?
不正解
正解:
C
説明:
Correct: The lecturer says 'it is not hopeless' and that combining observations boosts the signal, indicating optimism. A is wrong because the lecturer explicitly rejects hopelessness. B is wrong because the lecturer expresses an opinion. D is wrong because the lecturer treats the topic as important, not trivial.
6
What is the meaning of 'low-key' as used in the lecture?
不正解
正解:
C
説明:
Correct: The lecturer defines low-key as modest, faint activity rather than dramatic bursts. A is the opposite of the intended meaning. B is incorrect because secretive or illegal is not suggested. D is wrong because low-key implies subdued, not flashy or well-funded.
7
Which statement in the passage is presented as an incorrect or corrected claim?
不正解
正解:
C
説明:
Correct: The lecturer notes that a few early papers mistakenly suggested infrared satellites measure radio waves, and those claims were corrected. A is wrong because the passage describes dwarf galaxies as faint. B is wrong because image-stacking is described as helpful. D is wrong because spectroscopy is listed as useful for picking out young stars.
リスニングをスピーキングに変換
LexiTalkアプリで即座のフィードバックと毎日の練習を取得。
アプリをダウンロード