sign of the cross

a Christian sign made in blessing or prayer by tracing a cross from the forehead to the chest and to each shoulder, or in the air

［表示祝福或祈禱］畫十字

sign of the times

something judged to exemplify or indicate the nature or quality of a particular period, typically something unwelcome or unpleasant

時代的標志（尤指不受歡迎或討厭的事物）

the theft was a sign of the times.

偷竊是這個時代的標志。

signed, sealed, and delivered (或 signed and sealed

formally and officially agreed and in effect

正式簽署生效

sign something away/over

officially relinquish rights or property by signing a deed

（在契約上）簽字放棄（權利，財產）

I have no intention of signing away my inheritance.

我無意簽字放棄繼承權。

sign for

sign a receipt to confirm that one has received (something delivered or handed over)

簽收

sign someone in

record someone's arrival in a register

簽到登記

sign someone off

record that someone is entitled to miss work, typically because of illness

登記某人（尤指因?。┎灰斯ぷ?/p>

sign off on

(US informal)assent or give one's approval to

(美，非正式)認可，同意

it was hard to get celebrities to sign off on those issues.

很難得到名流對這些問題的認同。

sign someone on

take someone into one's employment

簽約雇傭

sign someone out

authorize someone's release or record their departure by signing a register

簽字放行；登記某人的離開

sign something out

sign to indicate that one has borrowed or hired something

登記某物借出（或租用）

I signed out the keys.

我登記將鑰匙借出。

sign someone up

(formally)engage someone in employment

(正式)雇傭

sign in

To record the arrival of (another or oneself) by signing a register.

簽到：通過在簽名記錄（另一個人或者是自己的）到達

sign off

To announce the end of a communication; conclude.

宣布廣播結束；結束

To stop transmission after identifying the broadcasting station.

在說完廣播電臺臺名之后停止播送

&I{Informal} To express approval formally or conclusively

【非正式用語】 正式同意：正式或結論性地表示同意

got the Congress to sign off on the tax proposal.

使國會正式同意這項稅務提案