从第二个分隔文件选择，或通过浏览找到该文件，看看是否发生了屏蔽。
Select from the second delimited file, or browse for the file, to see if the masking has occurred.
近年来，我国地铁的新线建设或旧线改造工程广泛采用在站台边缘设置站台屏蔽门，将隧道与车站分隔开以确保运营安全。
In recent years, PSD is widely used to ensure operational safety by separating the tunnel and the station on the edge of the platform in constructing a new subway line or renewing the old line.
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