The school uses a buddy system to pair newcomers with older students.
学校采用结伴制让每个新生跟一较大的学生结伴以获得照顾。
《牛津词典》
2
This pair should be, at any given time, unique for each file on a system.
在任何给定时刻，对于系统上的所有文件而言，这个数字组合都应该是惟一的。
3
Also known as Keenan's system (for its discoverer) and Arp 104, the interacting galaxy pair is some 17 million light-years away in the constellation Ursa Major.