平台上的警卫吹响了哨子.On the platform, the guard blew his whistle.裁判吹响了比赛结束的哨音。The referee blew his whistle for full time.裁判吹响哨子，比赛才算结束。The game's not over till the ref blows the whistle....
A review with 21 references on development and applications of calix crown others are described.综述了杯芳冠醚的产生、发展及应用研究的新进展,展望了它的工业应用前景.A review with 21 references on development and applications of calix crown ethers are des...