To “second” something means to be in support of a proposed idea or motion.

second某事的意思是支持一個(gè)提議或想法。

Formally, in a meeting when someone suggests or proposes an idea, there needs to be a “second” (someone else who supports the motion) for discussion to take place that results in a vote. Without a “second” the idea or motion dies and is not considered.

正式地說，在會(huì)議上，當(dāng)有人提出一個(gè)建議或想法時(shí)，需要有第二個(gè)人（支持該動(dòng)議的其他人）進(jìn)行討論，然后進(jìn)行投票。沒有second的想法或動(dòng)議則不被考慮。

Informally, if people are just talking in a group and someone has an idea or makes a point about any particular subject, someone else in the group may say, “I second that”, meaning that he/she supports the idea and agrees with what was said.

非正式地說，如果人們只是在一群人中交談，有人對(duì)任何特定的主題有一個(gè)想法或提出一個(gè)觀點(diǎn)，這個(gè)群體中的其他人可能會(huì)說，I second that，意思是他支持這個(gè)觀點(diǎn)并同意所講的內(nèi)容。

例句：

- How about pizza for dinner?

-今晚吃披薩怎么樣?

- I second that!

-我同意。

The motion was proposed by the club's chairwoman and seconded by the secretary.

該動(dòng)議由俱樂部主席提出，由干事附議。

- I could use a drink.

-我想喝杯飲料。

- I'll second that.

-我贊成。

（來源：每日學(xué)英語(yǔ)公眾號(hào)）