Photooxidant
光氧化剂
🗣️ 情景例句
Then, take this afternoon off.
那么，今天下午就休息一下吧。
Little strokes fell great oaks.
水滴石穿。
Their parents usually tell them that Father Christmas will come during the night.
他们的父亲通常告诉他们，夜间圣诞老人会来的。