When you work with Swing GUI components, you don't have to worry about a peer's focusability.
而当您使用Swing GUI组件时，就不必担心对等组件的可聚焦性。
The focusability of a peer is implementation dependent and returns you to the problems of the existing focus management subsystem.
对等组件的可聚焦性（focusability）是依赖于实现的，因此 您又要回过头来面对现有焦点管理子系统所存在的问题。
It is shown that the thermal effect decreases the peak intensity and beam focusability in the far field.
结果表明：热效应使远场光束的峰值光强和可聚焦能力下降。
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