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Chinese dictionary
v.when the time comes; at the appointed time; on the occasion
大桥下个月竣工,届时将举行通车典礼。
There will be an opening ceremony next month when the bridge is completed.
届时请务必出席。
Your presence is requested for the occasion.
届时,该问题有望得到解决。
By then the problem will hopefully have been solved.
讲师届时会指正你的错误。
The instructors will then point out your mistakes.