V-ERG
（使）（时间）延长；（使…）持续更长时间
When something lengthens or when you lengthen it, it lasts for a longer time than it did previously.
例句
Vacations have lengthened and the work week has shortened...
假期延长，工作周就缩短了。
The council does not support lengthening the school day to fit in other activities.
委员会不支持通过延长在校时间来插入其他活动。