青年中文mask must be worn的意思
mask must be worn中文翻譯：
必須佩戴口罩
相似詞語短語
be must───必須
be worn out───（物）破舊；疲憊不堪；用壞了的
must be happy───一定很開心
be must for───必須
it must be───它必須是；一定是
must be the───一定是
must be nice───一定很好
that must be───那一定是
must be that───一定是那個
雙語使用場景
she added: "A mask can be worn continuously for up to eight to 10 hours, but must be replaced if it is taken off at any stage.───她補充說：“一只口罩持續佩戴可以達8-10個小時，但是期間一旦摘下就必須更換。”
gas mask must be worn───必須戴防毒面具——
英語使用場景