Contact stain(ing)
[化] 接触性污染; 污斑; 污色
🧩 词语组成解析
contact
['kɑntækt]
n. 接触;触点;[医]（传染病）接触人;门路;
vt. 使接触;与…联系;与…通讯（或通话）;
vi. 联系，接触;
con共同+tact接触→共同接触 → 接触；联系
🗣️ 情景例句
I'm so sad to see this little dog without her family.
看到这只狗没有家 我真难过。
The face is the index of the mind (or heart).
相为心证。
After you printed the book, you had to throw away the carved pieces of wood.
你把书印出后，不得不把刻过的一片片木板扔掉。