重點講解：
1. be considered to do sth.
被認為是；
eg. She is considered to lack experience.
人們認為她經驗不足。
eg. Most loess is considered to be an eolian deposit.
大多數黃土被認為是一種風成沉積。
2. be belived to do sth.
被認為；
eg. She was believed to have the gift of prophecy.
據信她有預言的天賦。
eg. These creatures were believed to have come from outer space.
據信這種生物來自外太空。
3. mount on
安裝；安置；裱；
eg. Her husband mounts the work on velour paper and makes the frame.
她丈夫把作品裝裱在絨紙上，并制作了畫框。
eg. The support for the fence is mounted on an extension to the table.
籬笆的支撐部分安裝在桌子延長出的地方。