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》

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。

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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.

也被称作基南系统(以发现者命名)和Arp 104，这对互相影响的星系约1700万光年远，在大熊座。

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It might be that the two base-pair system is the best.

ECONOMIST: A new kind of DNA

The system uses a pair of security officers.

CNN: Airport security bares all, or does it?

Hybrids need to be equipped with larger battery packs, smaller and more fuel-efficient engines and a "two-mode system" that uses a pair of electric motors that propel the car at lower speeds.

FORBES: Cleaner Cars