🧩 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
I appreciate your kind words.
我很感谢你好心的安慰。
The battle is to the strong.
强者必胜。
Both the police and the workmen were grateful to the student for this piece of advance information.
警察与工人都对那个学生事先通报情况表示感谢。