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一、用under表示

1. 表示具體意義的“在……下”。如：

Your bag is under the bed. 你的提包在床底下。

She put the letter under the pillow. 她把信放在枕頭下。

Under a microscope a hair looks like a thick stick. 在顯微鏡下，一根頭發(fā)看上去像根大粗棍子。

2. 表示抽象意義的“在……下”。如：

We did the work under his direction. 我們在他的指導(dǎo)下工作。

Under present conditions no change is possible. 在目前情況下不可能有變化。

It’s hard to stay sane under such awful pressure. 處于這種可怕的壓力之下，不瘋才怪呢。

The group flourished under her firm leadership. 這個團隊在她的堅定領(lǐng)導(dǎo)下興旺發(fā)達。

Under the new management things have gone from bad to worse. 在新的管理人員領(lǐng)導(dǎo)下，情況反而更壞了。

二、用in表示

The trees threw long shadows in the moonlight. 在月光下，樹木投出了長長的影子。

Make sure that the figures on the dial can be seen in direct sunlight. 要確?？潭缺P上的數(shù)字在日光下可以看見。

In given conditions a bad thing can be turned into a good one. 在一定條件下，壞事可以變?yōu)楹檬隆?/p>

Time is an important consideration in this case. 在這種情況下，時間是一個要考慮的重要因素。

In the ordinary course of events, I visit her once a week. 在一般情況下，我每周去看她一次。

In most instances the pain soon goes away. 在多數(shù)情況下，這種疼痛很快就消失。

三、用with表示

He got back his wallet with the help of the police. 在警察的幫助下，他找回了自己的錢包。

With the teacher’s help, I worked out the problem at last. 在老師的幫助下，我終于算出了這道習題。

I left as early as was consistent with politeness. 我在不失禮的情況下，提前離去了。

四、用by表示

He worked by the light of a candle. 他在燭光下工作。

Animated by fresh hope, he started again. 他在新希望的激勵之下，又從頭做起。

五、用to表示

Don’t expose your skin to the sun for long. 別讓皮膚長時間暴露在陽光下。

六、用through表示

He got his job through a friend. 在一位朋友的幫忙下他得到這份工作。

七、用beneath表示

The river flows beneath the old bridge. 小河從那古老的橋下流過。

The sun is now beneath the horizon. 太陽此刻落到地平線下了。

I had arranged to meet him beneath the statue in the park. 我和他約好在公園的塑像下碰頭。

八、用其他方法表示

Quite unknown to me, she’d gone ahead and booked the holiday. 在我完全不了解的情況下，她已先行辦好了度假的預(yù)訂手續(xù)。

I was hurried into making an unwise decision. 我在催逼之下草率地做出了不智的決定。

Higher salaries are seducing many teachers into industry. 在高薪利誘之下，許多教師改行進入工業(yè)界。