He seemed to know the perfect time to tell a joke and when to remain silent.

VOA: special.2009.10.11

If you look really carefully, you could find it was not a single line but two lines, and Bohr is silent on such matters.

如果你仔细观察的话，会发现这是两条谱线而非一条，对这一研究，波尔不得不沉默。

麻省理工公开课 - 固态化学导论课程节选

Some of this can be done if consumers make different choices in what they eat, but some can be silent changes too, so Frito-Lay taking the Trans fats out of their products and switching them with a healthier fat is a silent change that could have a positive impact on public health.

有些只要消费者选择其它的食物即可做到,但也有些变化是悄无声息的,菲多利将其产品中的反式脂肪,替换成更健康的脂肪就并未声张,这对大众健康有着积极的影响

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Other risk factors for a silent stroke are high blood pressure, heart disease,diabetes and tobacco use.

VOA: special.2009.08.12

Their yell at the top of the world seems to Sal something that calls for a replacement; it calls for some other prophet to come walking ragged towards them and make them fall silent with his word.

他们在世界之巅的叫喊对Sal来说,似乎是在要求一个代替者;,需要另一个先知衣衫褴褛地朝他们走来,用他的话让他们安静。

耶鲁公开课 - 1945年后的美国小说课程节选

The researchers reported a link between silent strokes and a condition called atrial fibrillation.

VOA: special.2009.08.12

LeBron James has remained silent until now, and will announce his future plans in kingly fashion Thursday night on a nationally televised program simply titled "The Decision" on the ESPN television network.

VOA: standard.2010.07.08

civilian legal system. "Under domestic criminal law, the moment the person is in the hands of the United States government, they are entitled to be told they have a right to a lawyer and can remain silent,"

VOA: standard.2009.11.25