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C228 · 普通句（141 课）
Safety glasses should be worn while doing experiments in the
Course 228
(普)Safety glasses should be worn while doing experiments in the lab.
1 句 · 父母与孩子分角色配音
旁白 neutral
Safety glasses should be worn while doing experiments in the lab
在实验室进行实验时，应佩戴护目镜。
