词汇讲解：


1.mock模仿

如：
She opened her eyes wide in mock disbelief.
她睁大眼睛假装不相信。

The army training exercises ended with a mock battle.
军事训练演习以一场模拟战结束。

2. engage in从事，参加

如：I have no time to engage in gossip.
我无暇闲聊.

Is it wise to engage in active sports at your age?
我这样的年纪积极参加体育活动是否明智？

3. sober清醒的,沉着冷静的,稳重的,颜色暗淡的

如：He is perfectly sober.
他根本没喝醉。

They had to give a sober assessment of the situation.
他们必须对情况做个实事求是的估量。

4.grave严肃的,严重的,低沉的

如：
His face was grave when I told him my decision.
当我告诉他我的决定时, 他的脸色很严肃。

The situation poses a grave threat to world peace.
这局势对世界和平构成了严重的威胁。

5.let out放出，泄露

如：
The prisoners were let out to work in the garden.
囚犯们被放出到花园里去劳动。

When the land was seen, the sailor let out a whoop of joy.
当看见陆地时, 那水手发出一声欢呼。

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