每年夏天，这个沿海小镇都要为度假者的大批涌入做好准备。

Each summer, the coastal town braces for an ___invasion of vacationers.

学生一年一度的大量涌入彻底改变了这个安静社区的氛围。

The annual ___invasion of students completely transforms the atmosphere of the quiet neighborhood.

假日期间购物者突然大量涌入，让这个小购物中心不堪重负。

The sudden ___invasion of shoppers during the holiday season overwhelmed the small mall.