have something to offer

have something available to be used or appreciated

有东西可用（或可欣赏）

offer one's hand

extend one's hand to be shaken as a sign of friendship

伸出友好的手

on offer

available

可利用的

the number of permanent jobs on offer is relatively small.

长期工作的机会相对较小。

open to offers

willing to sell something or do a job for a reasonable price

愿意以合适价格出售某物；愿意以合适代价做某一工作

offer something up

(technical)put something in place to test or assess its appearance or fit

(技)把…摆好（或放到位）（以便检测或评估其外观或状况）

the infill panels are offered up and bolted in position.

用于镶拼的填块已摆好位置并用螺栓固定，以便检验外观效果以及是否合适。