... 准许外出,离开住处 permit out; permit sb to go out of doors 允许通过,穿过 permit to pass through 允许通过,穿过 permit to pass through sth ...
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New laws make it harder to pass through checkpoints with guns, even with an official permit.
新法律的出台使得带枪者通过检查点盘查要花费更多时间，纵你有官方许可也是枉然。
The grating can filter signal and permit light with certain wavelength to pass through, and the signal will be reflected which can't go.
光栅对光信号有一定的过滤作用，只允许一定波长的光通过，不能通过的光波将被反射回来。
Transistors can be made with other materials. They are less costly, and produce less heat. But they also permit less electricity to pass through.
半导体管也可以使用其他材料制成，（比晶体材料制成的半导体管）成本低、产热少，但是通过的电流也较少。
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