Now and then a bird's song broke in upon the silence of the wood.

鸟鸣声不时打破林中的寂静。

沉默

What is the reason for your long silence? 你长时间沉默的原因是什么?

无音信, 失去联系

Forgive me for my long silence.请原谅我好久没给你写信。

寂静,沉默, 无音信的时刻/期间

Let's observe a minute's silence in memory of the dead.让我们为死者静默一分钟。

vt. 使安静, 使沉默

The arrival of the teacher silenced the class. 教师的到来使全班安静下来。

1. Phrases:

1). keep warm

2).be dangerous

be in danger

　danger; risk

danger 是个通用词，其"危险"的含义可强可弱，可大可小，risk 亦然，其不同于 danger 之处仅在于：risk 还包含着"知道危险的存在"的意思，所以它可汉译为"冒险"，另外，danger 只用作名词，而 risk 既可用作名词，也可用作动词。用作名词的 risk 的常用搭配为 take (run) the risk of doing...

He stayed up so late that he was afraid that he was in danger of oversleeping and being late for work. 他很迟都未睡觉，所以他担心会有睡过了头并且上班迟到的危险。

The country is in danger.那个国家正处在危险之中。

The doctor said that his life was out of danger.医生说他的生命已经脱险了。

Mrs. Anne Sterling did not think of the risk she was taking when she ran through a forest after two men.安妮·斯特林夫人穿越森林追赶那两个男人时，没有去想自己所冒的风险。

I wouldn't run the risk of being late for work..我不会冒迟到的危险的。

3).run out

　sth. run out 用完, 耗尽

Our food soon ran out.我们的粮食很快就吃完了。

结束, 期满