難句突破：

(1) Moreover, a study carried out eight years ago by researchers at the University of Aarhus, in Denmark, revealed that women who suffered the death of a child or spouse from some catastrophic illness around the time they conceived were much more likely to give birth to girls than to boys.

[主體句式] A study revealed that...

[結(jié)構(gòu)分析]這是一個復合句，主語后面是一個過去分詞短語做定語；revealed后面的賓語從句比較復雜，從句的主體句式為women or spouse were likely to ...，狀語中that 引導的定語從句用來修飾time, 第一個主語women后有一個以who引導的定語從句。

[句子譯文] 。而且，八年前奧爾胡斯大學研究者們做的一項研究也表明經(jīng)過了第一個孩子死亡的婦女或在懷孕期間經(jīng)歷過一些災難性疾病的夫婦更有可能生女孩。

(2) If a mother's stress adversely affects the development of her fetus then selectively aborting boys, rather than wasting time and resources on bringing them to term, would make evolutionary sense.

[主體句式] If... then selectively aborting boys...would make sense.

[結(jié)構(gòu)分析] 這是一個帶有條件狀語從句的復合句，主語由現(xiàn)在分詞短語構(gòu)成。

[句子譯文]如果母親的壓力對胎兒的發(fā)展起了相反的影響，選擇性地將男孩流產(chǎn)，而不是浪費時間和資源將他們養(yǎng)足月，那么就能說明進化的問題了。

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