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)
🗣️ 情景例句
Please pass me a knife.
请把刀递给我。
He should meditate on the problem.
他必须就那个问题好好地想一想。
But even in the most favourable circumstances only a small fraction of the creatures that die are preserved in this way before decay sets in or, even more likely, before scavengers eat them.