OG 204 ?

formyf

It is actually OK for these not to match. "artly because" is used correctly to indicate the reason for doing something, while "partly to (infinitive)" is used correcly to indicate the goal of doing something. Here we are learning two things about the use of crossbreeding: the goal of doing so (to acquire certain characteristics) and the reason for doing so (because it provides vigor). We have to mis-match to convey the correct meaning.

Also note that "partly because certain characteristics should be acquired..." seems to indicate that cattle breeders are being compelled to use crossbreeding by somebody else who has an opinion about the characteristics of steers. The intended meaning of the sentence is that the breeders are using crossbreeding to accomplish some goal of their own. The use of "should" here is actually a classic example of a choice A that is less logical than some other choice. In such a case, it is OK to go with a choice that deviates from the meaning of the original.

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Emily Sledge
Instructor
ManhattanGMAT
国外网站的解答

xixigongzhu91

E is correct
如果你想选D的话，应该是：
partly because certain characteristics  should be acquired by their steers,and partly because crossbreeding is said to provide hybrid vigor.注意这里要有“，”，因为链接的是2个完整的句子。
E选项省略了because crossbreeding (be)  按照省略的原则，be必须要省，而连词（because)和名词（crossbreeding)可省可不省。the purpose of crossbreeding is to acqiure ......
do you understand?

yinghua9122

奇怪？
不是吧？这里acquire的执行者到底是谁啊？是cattle breeders还是crossbreeding啊？

如果是前置省略的话，那acquire的主语就成了crossbreeding了。---可我觉得这逻辑上不通吧？

请NN帮忙啊......

我的理解是：to require 和 to provide 都是表示目的的， Cattle breeders used crossbreeding to acquire... , to provide...