close in

phr

• ① 包围;笼罩;(敌军、暮色、黑暗等)迫近
  • Night is closing in.夜晚逐渐迫近。
  • The enemy closed in on [upon] our position.敌军迫近我们的阵地。

• ② (白昼)渐短
  • The days are beginning to close in.白天开始渐短。