be long in

• prep. 很久才(很不容易)

be long in的用法和样例：

例句

用作介词 (prep.)

1. There was a long lag in forwarding mail to us.
   转寄给我们的邮件晚了很久才拿到。
2. They caught the puppy after a long chase.
   他们追了很久才把小狗逮住。