1.at the end of 在……尽头;在……结束时
Pass the message down to the people at the end of the table.
把这份电报往下传给坐在桌子末端的人们。
2.be rich in 富有…的
The country is rich in oil and coal.
这个国家石油和煤的资源丰富。
3.start with 从…开始
You can start with one of them and add the others as you have time.
你现在就可以开始只用其中之一,如果你有时间的话,还可以加上其它的。