- I do not know if he has arrived,but I'll find out.
我不知道他到了没有,可是我会打听清楚的。
- The dividing line is not always so clear.
这个界线并不总是那么清楚的。
- Those figures are not easily distinguishable.
那些花纹不易区别。
- He decided to use carbon because it does not melt.
于是,他决定用碳,因为碳不易熔化。