clear 
英 [klɪə]  美 [klɪr] 
adv. 清晰地；完全地

v. 变清澈；使清楚；扫除，清除；清（嗓子）；跳过，通过；结清；放晴

adj. 清澈的；清晰的；明确的；晴朗的，明亮的；无瑕疵的；畅通的

例句：
She seemed clear about what she saw. 

她似乎很明白她看到了什么。

He was not altogether clear in his own mind about which type of political arrangement would be the most appropriate. 

他心里并不太明白哪种形式的政治安排是最合适的。

At that time it wasn't clear in my mind what had happened. 

那时我心里并不明白发生了什么。

I am quite clear in my mind that we need to change. 

我心里非常明白我们需要改变。

To clear the land and harvest the bananas they decided they needed a male workforce. 

为了清理土地和收割香蕉，他们决定雇请一队男劳力。

Stewart was trying to clear a path for the stretcher. 

斯图尔特正在努力为担架开路。