Tyndallometer
廷德尔测尘计
🗣️ 情景例句
She sure keeps busy.
她真的是忙个不停。
Caution is the parent of safety.
谨慎小心是安全之源。
it has to develop (partly by means of touch) the ability to judge roughly three-dimensonal distances.
儿童必须发展（部分通过触觉）粗略判断三维空间距离的能力。