Recently, a new generation of mirrorless cameras have hit the market.
不过最近，新一代的无反光镜相机已投放市场。
The characters of mirrorless lasers are described. The threshold condition of producing laser has been inferred theoretically.
本文论述了无腔激光器的特点，从理论上推导出激光形成的阈值条件。
The characters of mirrorless lasers are described. The threshold condition of producing laser has been inferred theoretically.
本文论述了无腔激光器的特点，从理论上推导出激光形成的阈值条件。
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