close up

柯林斯詞典

1. PHRASAL VERB If someone closes up a building, they shut it completely and securely, often because they are going away. (指臨行前) 鎖好
Just close up the shop. 就把店鎖好。
The summer house had been closed up all year. 避暑別墅全年都是門戶緊閉的。
2. PHRASAL VERB If an opening, gap, or something hollow closes up, or if you close it up, it becomes closed or covered. (缺口、縫隙) 閉合
Don't use cold water as it shocks the blood vessels into closing up. 不要用冷水，因?yàn)槔渌畷?huì)刺激血管，使之閉合。