一件事不一定是真的或假的；它可能既是真的又是假的。
A thing is not necessarily either true or false; it can be both true and false.
The power of science lies in its universality and objectivity, it transcends culture and national boundaries.
We have to be prepared to take some risks, but they must be calculated risks.
Don't wait until they tell you, you are ready. Show it. Do it.