Bottlenecks
n. 瓶颈( bottleneck的名词复数 ); 瓶颈路段（常引起交通堵塞）; （尤指工商业发展的）瓶颈; 阻碍
🗣️ 情景例句
When my grandpa is in a bad mood, he's grouchy with everyone.
爷爷脾气坏的时候，对所有的人都不满意。
What shall I send him for his Christmas?
我要送他什么东西作为圣诞礼物？
Right! Hold it straight! I'll fill in the hole with earth.
好的！扶直了！我用土填坑了