Unstreaming
按学生年龄(而不是学习能力)分组
🗣️ 情景例句
Yes, what can I do for you?
是的，我能为您效劳吗？
Fine feathers do not make fine birds.
人不可貌相。
for fear the agents of other firms should be able to trace the kind of research they are likely to be undertaking.
他们生怕别的公司的情报人员据此摸到他们可能要从事的某项科研项目。