Undertide
n. 潜流；暗流；底流；掩盖着的倾向
🗣️ 情景例句
If you don't know a person's last name, use 'ma'am' or 'sir'.
如果你不知道一人的姓， 你应称呼他为 'ma'am' 或 'sir' 。
Too much water drowned the miller.
过犹不及。
We had a damaged shipment from you.
你们送来的货有损坏。