Backsiphonage
反虹吸
🗣️ 情景例句
Learning to express onself well is an important part of education.
学会把意思表达清楚是受教育的一个重要方面。
The doctor advised me to stay indoors more.
医生劝我要多待在屋子里。
but children were then too cowed to let them know how they really felt.
孩子们只不过被吓得不敢让父母知道自己的想法罢了。