GbEng
你下了这麽大工夫, 一定能考及格. You've done so much work that you're bound to pass the exam.
我们教授非常有才干，必定能解决这一难题。 Our professor is too capable not to solve this difficult problem.
举行典礼的大厅尚未完全布置好, 但到时候定能准备就绪. The hall isn't quite ready for the ceremony yet, but it will be all right on the night.