签约：通过签名参与某项活动或项目。
开始广播：宣布一天的广播开始。
sign on //
动词 to hire or employ 聘用
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... sign in签到;签字表收到 sign on签约受雇用 single out遴选出,选拔,找出 ...
... vendor n. 卖主 sign on v. 签约任用 attraction n. 旅行见闻讲演 ...
... 签到(Sign on) 签退(Sign off) 交换密钥(Key exchange) ...
开始广播；签约雇用
The sign on the bus read "Private: Not In Service."
公共汽车上的标志写着“私人所有：不运营。”
This paper lantern has the infamous swastika sign on it.
这只纸灯笼上有臭名昭著的纳粹标志。
The sign on the wall said 'Now wash your hands'.
墙上的牌子上写着“请洗手”。
We see this sign on drug stores and whenever we visit a doctor to get an order for medicine.
VOA : special.2009.03.22
- And here as promised is that other operator -- looks a little weird, but because assignment is already using the equal sign to assign one value on the right to a variable on the left.
在这里正像所承诺的那样，其他的操作-,看起来有点怪异，但是因为“=“已经被用来当赋值运算符了,用来把右边的一个值赋值给左边的变量。
计算机科学课程节选 : 哈佛公开课
With one swipe, I can sign on electronic screen, get rid of paper completely.
刷一下，我就可以在电子屏幕上签字，完全丢掉纸质的收据。
Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选 : 斯坦福公开课
In Key West, a sign on a monument says "America Begins Here."
VOA : special.2010.03.22
Just before leaving, they placed a metal sign on the surface.
VOA : special.2009.07.29
Centre-back Loovens and winger Parry also attracted interest but Ridsdale hopes the pair sign on at City.
The more carriers that sign on, the more broadly Google's technology will be distributed.
Even some Senate Republicans have hinted that they could sign on to such a deal.
FORBES: Don't Hold Your Breath For A Budget: House, Senate Aren't Even Trying To Reconcile Bills