2.at sight即期，见票即付
sight n.景象，景物；视觉，视力
She lost her sight in an accident.她在一次事故中丧失了视力。
I caught sight of an empty seat at the back of the bus.我看到公共汽车的后面有一个空座位。
to put sth. out of sight藏起某物
to see the sight游览名胜
It cost him a sight of money.那花了他许多钱。
in sight可见，看得见；在望；不远
Peace was in sight.和平在望。
lose sight of看不见；失去联系；忘记；没有考虑到
out of sight看不到，不被看到；很高；很大
Keep out of my sight.不要让我看见你。
3at the request of应…请求
request n.要求；请求
a request for help请求帮助
She made a request for some water.她请求给点水。
We shall give your request our careful consideration.我们将仔细考虑你的要求。
Do they play requests on this radio show？电台的节目中有点播节目吗？
4.attached photo附照
attached adj. 附上……的
（在外贸信函中，经常会用到这个单词，例如说，随函附上我们的样品等等。）
goods attached查封的货物
attached to附着
wage attached to a post职务津贴
take a photo（自己来）拍照
have[get] one‘s photo taken请人给自己拍照
have a photo taken with sb.和某人合影
make a photo of摄下……的图象
5.attachment附件
爱慕， 依恋； 忠诚（for， to）
an attachment to one‘s motherland对祖国的忠诚
the attachments of a bicycle自行车的零件