3 sentences

1. 许多昆虫在温暖湿润的夏季会大量繁殖。

   xǔ​duō kūn​chóng zài wēn​nuǎn shī​rùn de xià​jì huì dà​liàng fán​zhí.

   Many insects breed in large numbers during the warm and humid summer.

   Source: Dong Chinese Dictionary

2. 许多植物在寒冷的冬季会进入休眠状态。

   xǔ​duō zhí​wù zài hán​lěng de dōng​jì huì jìn​rù xiū​mián zhuàng​tài.

   Many plants go into a state of dormancy during the cold winter.

   Source: Dong Chinese Dictionary

3. 这家工厂在生产旺季会雇佣大量临时工。

   zhè jiā gōng​chǎng zài shēng​chǎn wàng​jì huì gù​yōng dà​liàng lín​shí​gōng.

   The factory hires a large number of temporary workers during the peak season.

   Source: Dong Chinese Dictionary