She said hand washing is an essential part of good sanitation.

她说，洗手是卫生措施的一个基本部分。

youdao

She said hand washing is an essential part of good sanitation.

她说，洗手是卫生措施的一个基本部分。

youdao

She said hand washing is an essential part of good sanitation.

她说，洗手是卫生措施的一个基本部分。

youdao