There are no hard and fast rules about this. 这事没有什么硬性的规定。 Research indicates that eating habits are changing fast. 研究显示，饮食习惯正迅速改变。 Things are not moving as fast as we hoped. 事情的`进展不像我们希望的那么快。 The water was rising fast. 水迅猛上涨。 He's going too fast. 他走得太快。 上一篇：local culture可数吗 下一篇：liketo后面加什么形式 |