The buyer has to sign a delivery note as proof of receipt.

购买者必须签收送货单表明货已收到。

《牛津词典》

World leaders are expected to sign a treaty pledging to increase environmental protection.

人们期望世界领导人们能签署一份承诺加强环境保护的条约。

《柯林斯英汉双解大词典》

Here at the Sea Life Centre we're taking action by asking as many people as possible to sign a petition.

在海洋生物中心，我们正在采取行动，请求尽可能多的人签署一份请愿书。

youdao

(TRANSLATION) "It is a clear sign that the United States is taking Russia and its arguments as seriously as their national security considerations."

VOA: standard.2009.09.17

In the event (1) Israel and Syria sign a peace agreement, (2) Israel withdraws from the Golan under that agreement and (3) Syria, at some point in the future, decides to launch an attack on Israel to capitalize on that Israeli withdrawal, Syria would know that its aggression will antagonize the United States whether or not U.S. troops are stationed on the Golan.

CENTERFORSECURITYPOLICY: Center for Security Policy | What hazards along the road to Damascus? Mission impossible

Marketers buy the ads and then figure out their return on investment based on how many people click on them, "like" them (remember the value of a "like") or take some other action (sign up for a contest, download, etc.).

FORBES

That's a good sign. (Applause.) That's a good sign.

WHITEHOUSE: President Obama Tells Wall Street to Back Reform