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1·His voice was suddenly high and screechy.

他的声音突然变得高而尖锐。

2·An hour later another song, loud and screechy, filled the room.

一个小时后，房间里响起了另一首歌，响亮而刺耳。

3·However, although one of my neighbors is beefy and weighs 120kg, his voice is high and screechy, just like the one from a guy half his size.

但是我那邻居，虽然他高头大马，体重有120公斤，然而他的声音却又高又细，就像一个体格比他小一半的人发出来的声音。