What is the average rate of utilization of two serves?

什么是利用两个发球的平均率是多少？

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Chapter two serves as a theoretic foundation for this paper and deals with related theories.

第二章为本文的理论基础部分，论述了相关理论。

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Diets that include two serves of fruit and five serves of vegetables a day should provide enough vitamin C to boost non-heam iron absorption.

一天的饮食中如果包含2种水果和5种蔬菜，应该能够提供足够的维他命C来加速非血红素的吸收过程。

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So in this context, the river of oblivion serves an obvious purpose in the context we have here in Book Two.

故在这部分文本中，遗忘之河便是为了遗忘而存在的,在第二册书正是这样体现的。

耶鲁公开课 - 弥尔顿课程节选

Nadal breaks back twice. 2-1 up with two serves.

BBC: Nadal v Davydenko as it happened

The crowd were willing Williams on but sadly her inconsistency proved decisive in the next game, as two big serves were followed by two double-faults and a wide forehand that allowed the world number four to close out a dramatic victory.

BBC: Jankovic will play Maria Sharapova for a place in the final

Broady and Farquharson had three breakback points in Burton's next service game and took the second to level the set at 3-3 and Morgan saved two break points in his next service game with two big serves.

BBC: Wimbledon 2010: GB's Broady and Farquharson take title