Back-bone
分水岭；脊柱
🧩 词语组成解析
back
[bæk]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背书于;下赌注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
bone
[bon]
n. 骨头;尸骨;骨质物;有…样的骨头的;
vt. 挑鱼刺，剔骨头;剔去…的骨;
vi. 苦学;专心致志;
🗣️ 情景例句
Sorry, but she is out for lunch right now.
抱歉，她现在出去吃午饭了。
The doctor said it's just a slight infection, There's nothing to worry about.
医生说只是轻微的感染，不需要担心。
Excuse me, Miss Yang, she said.
“请原谅，杨小姐，”她说。