🧩 词语组成解析
abbr. 研究与开发处（Office for Research and Development）；运筹学部（Operational Research Division0；旋光色散谱, 旋光分散作用（Optical Rotatory Dispersion）
kangaroo
[,kæŋɡə'ru]
n. [动]袋鼠;
rat
[ræt]
n. 大老鼠;似鼠动物;<非正式>鼠辈，卑鄙小人;
vi. 捕鼠;<俚>背叛，告密;
🗣️ 情景例句
Sure. I will. You can count on that.
我一定会。
If I wanted to rent a van, how much would it cost?
要是我租一辆搬运车，得花多少钱？
Please make sure you mark the shipment for careful handling.
请不要忘了在货物上标明“小心搬运”。