Polythioester
[化] 聚硫酯
🗣️ 情景例句
Yes. Here you are.
好的，都在这儿。
Is this a recorded program?
这是不是录音节目？
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。