Suddenly, I saw her lips begin to tremble and tears begin to flow down her cheeks.

突然，我看到她的嘴唇开始颤抖，眼泪开始从她的脸颊流下。

youdao

Suddenly she gave a low, choking moan and began to tremble violently.

突然她发出了一声低沉、令人窒息的呻吟，身体开始剧烈地抖动。

《柯林斯英汉双解大词典》

His mouth became dry, his eyes widened, and he began to tremble all over.

他嘴巴干涩，眼睛睁大，而且开始全身发抖。

《柯林斯英汉双解大词典》

And they tremble. Standing on them is like trying to balance on a floating mattress.

VOA: standard.2010.03.29

The water on the surface of the pool rippled and the same breeze caused the aspen leaves to tremble.

NEWYORKER: Beginners

Obama is in danger of wresting that tradition away from Republicans, and mainline establishmentarian conservatives who grasp this are right to tremble.

FORBES: Romney's 'Gifts' Gaffe Highlights GOP Confusion On Obamanomics

The first round of the 2013 NCAA Tournament begins this week in Dayton, Ohio, which means that employers are officially beginning to tremble.

FORBES: March Madness Employee Productivity Problem Is Overstated, Yet Influences Corporate Change