老师在讲物体下落的定律。 老師在講物體下落的定律。 老師在講物體下落的定律。

The teacher is explaining the law of falling objects.

Simplified
老师在讲物体下落的定律。
Traditional (Taiwan)
老師在講物體下落的定律。
Pinyin
Lǎoshī zài jiǎng wùtǐ xiàluò de dìnglǜ.
Bopomofo
ㄌㄠˇ ㄕ ㄗㄞˋ ㄐㄧㄤˇ ㄨˋ ㄊㄧˇ ㄒㄧㄚˋ ㄌㄨㄛˋ ˙ㄉㄜ ㄉㄧㄥˋ ㄌㄩˋ。

Written with HSK 7-9 vocabulary, at CEFR level C1.

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