通行證 [ㄊㄨㄥ ㄒㄧㄥˊ ㄓㄥˋ; tong1 xing2 zheng4]
a pass (authorization through a checkpoint)
a laissez-passer or safe conduct
to authenticate
to confirm name and password on a website
fig. a condition giving access to benefits (e.g. a diploma as a pass to a career)
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