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1.They used a giant scientific tool called LIGO—which stands for the Laser Interferometer Gravitational-Wave Observatory.
stand for 代表；支持；象征；擔任…的候選人
AIDS stands for Acquired Immune Deficiency Syndrome.
AIDS是的首字母縮寫。
I would like to see him stand for re-election.
我希望看到他競選連任。
2.Their job was to watch for these gravitational waves. They have been looking on and off since 2002.
on and off 斷斷續續地，不時地
Sam was flicking a flashlight on and off.
薩姆啪啪不停地把手電筒開了又關。
It rained on and off all day.
哩哩啦啦下了一天雨。
| 重點單詞 | 查看全部解釋 | |||
| gravitational | ['grævə'teiʃənəl] |
想一想再看 adj. 重力的，引力作用的 |
聯想記憶 | |
| immune | [i'mju:n] |
想一想再看 adj. 免除的，免疫的 |
||
| collaboration | [kə.læbə'reiʃən] |
想一想再看 n. 合作，通敵 |
聯想記憶 | |
| deficiency | [di'fiʃənsi] |
想一想再看 n. 缺乏，不足，缺點 |
聯想記憶 | |
| pond | [pɔnd] |
想一想再看 n. 池塘 |
||
| understand | [.ʌndə'stænd] |
想一想再看 vt. 理解，懂，聽說，獲悉，將 ... 理解為，認為< |
||
| foundation | [faun'deiʃən] |
想一想再看 n. 基礎，根據，建立 |
聯想記憶 | |
| expand | [iks'pænd] |
想一想再看 v. 增加，詳述，擴展，使 ... 膨脹， |
聯想記憶 | |
| spoke | [spəuk] |
想一想再看 v. 說，說話，演說 |
||
| avoid | [ə'vɔid] |
想一想再看 vt. 避免，逃避 |
聯想記憶 |
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