Lifespans
n. （人或动物的）寿命( lifespan的复数形式 ); 存在期; 使用期; 有效期
🗣️ 情景例句
Canada has the most beautiful waterfalls in the world.
加拿大有世界上最壮观的瀑布。
And the problems that some of us have had in the past year.
和去年我们一些人遇到的问题。
No, it isn't.
不，不是！