keep sth in order talk in low voice it's your turn let's begin in the form of make experiment either...or should /ought to the mixture of keep the balance of the nature draw an conclusion
1.Make... organized 2.talk in whispers(in low tones ) 3. It is your turn 4. Let's get it started (Let's begin/start) 5.In the form of 6.do an experienment 7.Either...or... 或者...或者 8.Ought to...