挂号的英文：
register

参考例句：

You'd better register this parcel.
你最好挂号邮寄这个包裹。

Sea baggage registered to Rio
由海路挂号托运到里约热内卢的行李.

I'd like to register this letter.
我将挂号邮寄这封信。

I want this letter registered.
我想挂号邮寄这封信。

PS FORM RECEIPT FOR REGISTERED MAIL(Customer Copy)
缴费业务表挂号邮件收据(顾客联)

You will have to go to the registration office first.
你得先去挂号去。

Registration of letters,parcels,trunks,etc
信件、包裹、衣箱等的挂号

I'd like to send this parcel by registered sea mail
这包裹我想寄海运挂号。

He asked his mother to send it by registered mail.
他让他妈妈用挂号邮件寄。

"I would like to send this by registered mail, please."
我想把这封信挂号寄出

register是什么意思：
n. 登记；注册；记录；登记薄；自动记录器；寄存器
v. 登记；注册；记录；正式提出；指示；表达；流露；留下印象；挂号邮寄

register signal
记录器信号

bond registered
登记注册的记名债券

register of voice
嗓音声区

air-supply register
空气供应记录器

You'd better register this parcel.
你最好挂号邮寄这个包裹。