U-boats
(U-boat 的复数) n. 潜水艇
🧩 词语组成解析
n. 船艇；船（boat的复数）
🗣️ 情景例句
Mary, we're going to miss you.
玛丽，我们会很想你的。
What beautiful trees those are!
那些是多么美丽的树呀！
Why didn't you tell me then?
为什么那时不告诉我呢？