Definition
Used to indicate that something or someone's performance or behavior is sufficient and should stop, often used to tell someone to stop behaving badly.
夠了！行了！(停止不當行為)
That'll do! Stop arguing, you two.
夠了！你們兩個別再爭吵了。
"I want another piece." "That'll do! You've had too much already."
「我還想要一塊。」「夠了！你已經吃太多了。」
He started shouting in the class, and the teacher said, "That'll do! Settle down."
他在課堂上開始大喊大叫，老師說：「夠了！安靜下來。」