词汇	spectrum segment
释义	spectrum segment 光谱段
随便看	keep sth from keep sth.from rust keep sth from sb keep sth going keep sth in abeyance keep sth.in good trim keep sth in mind keep sth in proportion keep sth.in reserve keep sth intact keep sth.intact keep sth.in the background keep sth off keep stick to keep still Keep still while I comb your hair Keep still while I fasten your shoe keeps to keeps to oneself keeps touch with keep straight on Keep straight on until you get to the church Keep straight to the lighthouse keep strictly to the terms of the contract keep strict watch