易混淆的单词： Laster

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Laster week I went to the theatre .

上星期我去剧院看戏。

Laster rifle , seeker missiles , assault cannons , various others .

连射步枪、跟踪导弹、突击炮等。

Ge-sio_2nanometer semiconductor particle thin films is applied widely in luminescence , laster , photo-switch , photo-communication etc.

ge-sio_2纳米半导体颗粒膜在发光、激光、光开关、光通信等方面的应用极为广泛。