用武力入侵;有害事物进入内部to invade

• 侵入别国领土

  invade another nation's territory

• 病菌侵入入体。

  Germs have invaded the body.

• 寒流侵入，气温急剧下降。

  When a cold current intruded, the air temperature suddenly dropped.

【地质】to intrude