例如,带有胚珠的松球的鳞苞综合体的螺旋状安排,亦即松柏目植物雌性殖器官的所在位置,对于气流模式的形成与产生殊为重要,而这些气流模式在松球的表现盘旋上升,从而把在空气中飞行的花粉从一个鳞苞传播至下一个鳞苞。
4.It was not the change in office technology,but rather the separationof secretarial work,previously seen as an apprenticeship forbeginning managers,from administrative work that in the 1880 s createda new class of dead-end jobs,thenceforth considered women s work.
十九世纪八十年代,产生了新的一类 没前途 的职业,这并不是因为办公室技术发生了改变,而是由于秘书工作 在此之前被视作是初起步的经理们的一种习见训练 与行政工作的分离。自此以后,这类 没前途 的职业便被视作是 女人的工作。
5.The increase in the numbers of married women employed outsidethe home in the twentieth century had less to do with themechanization of housework and an increase in leisure time for thesewomen than it did with their own economic necessity and with highmarriage rates that shrank the available pool of single womenworkers,previously,in many cases,the only women employers would hire.
二十世纪已婚妇女在家庭以外就业的人数不断增加,这与家务的机械化及这些妇女闲暇时间的增加并无多大联系,更多地是与妇女自身的经济需要和高婚姻率相关。高婚姻率致使所能雇佣的单身女工的总量缩减,而在此之前的许多情形中,单身女性则是雇主们所愿雇佣的唯一-一类妇女。
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