Tightens
v. 收紧( tighten的第三人称单数 ); （使）变紧; （使）绷紧; 加紧
🗣️ 情景例句
We had a cat when I was eight years old.
我八岁时养过一只猫。
He drinks a lot of milk every day.
他每天都喝很多牛奶。
not to mention the equally numerous small animals like field mice and voles which you do not see,
地上有不显眼的无数的老鼠和田鼠之类的小动物，