It is important to speak directly and clearly about your subject.
直接了当且明白清楚地说明自己的目的是很重要的。
Repetition is the mother of knowledge.
反覆学习是知识之源。
When you come to think about it, there are only four ways you can deal with rubbish: dump it, burn it, turn it into something you can use again, attempt to produce less of it.