surrogate GRE专八

1.For some people, reading travel books is a surrogate for actual travel.

对某些人来说, 读游记可代替真正的旅行。

2.The cat acted as a surrogate mum to the chicks.

这只貓当起了小鸡的妈妈来。

3.In the 1950s Harlow compared monkeys raised by their mothers with monkeys reared by wire or terrycloth surrogate mothers.

哈娄将由猴大的猴子，以及由铁丝或绵布制成的代大的猴子作比较，发现由代大的猴子变得不合群且极具攻击性。

4.It should be noted that the method for updating multipliers is similar but different to the surrogate subgradient method, which is more robust and stable for accelerating the convergence rate.

大量的测试表明了，在新的更新乘子的公式下，敛性和稳定性更好。