1. It can be difficult to ascertain the facts. 可能难以查明事实真相。
2. Through doing this, the teacher will be able to ascertain the extent to which the child understands what he is reading. 通过这样做,老师将能确定这个孩子对他正在读的内容的理解程度。
3. Cricket keeps an off-field umpire for boundary calls, and to ascertain whether batsmen are run out and if catches are real. 板球有一个场外的裁判来判定边界,并确定击球手是否出局,接球是否真实。
4. The police are trying to ascertain what really happened. 警方正设法查清到底发生了什么。
5. Could you ascertain whether she will be coming to the meeting? 请你弄清楚她来不来开会好吗?