n 间隔时间，其间(time or period between(two events))[U]：in the～在此期间，与此同时;I shall see her till next week，so please give her the message if you meet her in the～.我下周才能见她。如你在此期间见到她，请告之。Go there and come back as soon as you can;in the～I'll go on with the work.你快去快来，你不在时我接着干活。

adv 同时，期间(meanwhile) [无comp]：I finished the job on August 28th，but～a very interesting event had taken place. 8月28日我完成了那件工作，在此期间发生了一件很有意思的事。〖同〗meanwhile