英语中book order reserve 有何区别？

reserve 预定[约]; 租定(座位, 房间等)
book 预定,定(房间、车票等)
order尤指书面下定单，较正式

will book a hotel room;
预定旅馆房间；
bespoken merchandise;
订货；
engaged a box for the opera season;
为歌剧节预定个包厢；
reserving a table at a restaurant.
在餐厅订张桌子

order:1.定购；定货单,定货2.下订单：下订单（一张或数张）；要求供应或制作某
to collect an order提取定货
I'll have an order of fish.我要一客鱼。

super good answer

reserve- put on hold- interested in it

book order- order some books- you'll buy them