信上的日期不清楚。
这款手机软件的具体发布日期尚不清楚，但科学家需要收集1000个咳嗽样本之后才能建立起咳嗽数据库。
There's no word on when the mobile application will be released, but the scientists will need to collect around 1000 cough samples before the database is ready.
工厂关闭的准确日期目前尚不清楚，但可能会在7月份正常关闭期间。通用汽车每年会在7月关闭工厂两周，对车型进行调整。
The exact dates of the closures are not known, but they will occur around the normal 2-week shutdown in July when changes are usually made from one model year to the next.
我记不清那个重要战役的日期了。
这份通知印得很糟糕，我看不清末尾的日期。
The notice was badly printed and I could not make out the date at the bottom.
我记不清那次会议的日期了。
第一片消色差透镜确实的发明日期并不清楚，也不清楚第一位发明人是谁。
The exact date of the first achromatic doublet's creation is not known, nor is the name of the person who first accomplished the task.
电影上映日期目前尚不清楚。
邮戳不清或者没有邮戳的，以商标局发文后二十天或者收文前二十天分别作为当事人收到或者发出的日期。
If the papers are delivered or received by mail, the date on the postmark shall be taken as the date of delivery or receipt;
观察项：不清楚组织如何记录更改在生产中执行的日期。
OBS: It was not clear who was responsible for recording each change had been implemented in production.
观察项：不清楚组织如何记录更改在生产中执行的日期。
OBS: It was not clear who was responsible for recording each change had been implemented in production.
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