过去是一个陌生的国度;他们在那里做事的方式不同。
The past is a foreign country; they do things differently there.
我只是尽力做到最好。
数学是一门活生生的学科,随着新思想的出现而不断发展。
In the actual world, a very great deal of the evil that is done does not spring from evil motives.