1.a pinch of 一撮；少许

例句:He put a pinch of salt on his food.
他在自己的食物上洒了一撮盐。

2.hold back 犹豫不决

例句:The administration had several reasons for holding back.
政府因为几个原因而犹豫不决。

3.played an important role 扮演重要的角色；发挥关键作用

例句:Literature websites have played an important role in this trend.
在这一潮流中，文学网站扮演了重要角色。

4.take a chance 冒险；尝试

例句:You take a chance on the weather if you holiday in the UK.
在英国度假，只有赌天气了。