What is the main objective of this project?
這個項目的主要目標是什么？
What time did you get here?
你什么時候到達這兒的？
What in the world did they think they were doing?
他們到底認為自己在做什么？
Things ain't what they used to be.
現在情況不比從前了。
Call it what you will, it's still a problem.
不管怎么說，這仍然是個問題。