Collimators
n. 准直仪; 描准仪
🗣️ 情景例句
Mainly for the sports meet and also for sightseeing, I think.
主要是来参加运动会，我想也是为观光而来。
Please be on time.
请准时到。
What will be the population of these countries by the end of the twentieth century?
到20世界末较发达国家的人口将是多少？