Definition
Used to indicate that you fully understand what the other person is implying and that no further explanation is necessary.
尽在不言中
"You look very tired today." "Say no more, I barely slept last night."
「你今天看起来很累。」「不用说，我昨晚几乎没睡。」
"I know you like her." "Say no more, I get it."
「我知道你喜欢她。」「不用说，我懂了。」
"He's always late." "Say no more, I've known it all along."
「他总是迟到。」「不用说，我一直都知道。」