7 sentences

1. 上下班高峰期的地铁非常拥挤。

   shàng​xià​bān gāo​fēng​qī de dì​tiě fēi​cháng yōng​jǐ.

   The subway is very crowded during rush hour.

   Source: Dong Chinese Dictionary

2. 避开高峰期以后，地铁里松动了许多。

   bì​kāi gāo​fēng​qī yǐ​hòu, dì​tiě lǐ sōng​dòng le xǔ​duō.

   After the peak hours passed, the subway became much less crowded.

   Source: Dong Chinese Dictionary

3. 下班高峰期，大家都在往公交车上拥挤。

   xià​bān gāo​fēng​qī, dà​jiā dōu zài wǎng gōng​jiāo​chē shàng yōng​jǐ.

   During the rush hour after work, everyone is crowding onto the bus.

   Source: Dong Chinese Dictionary

4. 由于正值高峰期，街道上的车辆来回穿梭。

   yóu​yú zhèng​zhí gāo​fēng​qī, jiē​dào shàng de chē​liàng lái​huí chuān​suō.

   Since it's rush hour, vehicles are shuttling back and forth on the streets.

   Source: Dong Chinese Dictionary

5. 夏季是用电的高峰期。

   xià​jì shì yòng diàn de gāo​fēng​qī.

   Summer is the peak period for electricity consumption.

   Source: Dong Chinese Dictionary

6. 夏季用电高峰期，大家要注意节电。

   xià​jì yòng diàn gāo​fēng​qī, dà​jiā yào zhù​yì jié​diàn.

   During the peak electricity usage period in summer, everyone should be mindful of saving power.

   Source: Dong Chinese Dictionary

7. 国庆节假期是各大旅游景区人流量最大的高峰期。

   Guó​qìng​jié jià​qī shì gè dà lǚ​yóu jǐng​qū rén​liú​liàng zuì dà de gāo​fēng​qī.

   The National Day holiday is the peak period for visitor traffic at major tourist attractions.

   Source: Dong Chinese Dictionary