Her jumper had a darn at the bottom.
她的无袖连裙下有一个丁。
He had a patch on the elbow of his jacket.
他的有一块丁。
She sewed patches on the elbows of jacket.
她在夹克缝了几块丁。
This patch looks a bit unprofessional.
这块丁有点像出自外行之手。
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