首先，关闭手机，保持安静。首先，關閉手機，保持安靜。首先，關閉手機，保持安靜。

First of all, power off your cellphones and remain silent.

Simplified: 首先，关闭手机，保持安静。
Traditional (Taiwan): 首先，關閉手機，保持安靜。
Pinyin: Shǒuxiān, guānbì shǒujī, bǎochí ānjìng.
Bopomofo: ㄕㄡˇ ㄒㄧㄢ，ㄍㄨㄢㄅㄧˋ ㄕㄡˇ ㄐㄧ，ㄅㄠˇ ㄔˊ ㄢㄐㄧㄥˋ。

Written with HSK 5 vocabulary, at CEFR level B2.

Words in this sentence

This sentence is from Tatoeba, contributed by vicch, with the English translation by vicch. It is used here under CC BY 2.0 FR.

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