response indicates a changing perception of reproduction and the high costs of raising a child, experts say. Perception指对某事的“看法、观念”等，而reproduction是“生育、生殖”的正式说法。简单而言，“生孩子”可说bear a child 或give birth ……

will be given free advice on reproduction, sexual health and contraception; schools will cover part....---------------------------------------contraception 避孕reproduction 繁殖maternity leave 产假 ……

;perception   n. 理解，看法；感知同根词：perceive v. 察觉，感觉；理解Everyone’s perception of reality is slightly different.How do you perceive your new role?perception   n. 理解，看法；感知同根词：perceive v ……

to “hatcheries” and make in-vitro fertilization the normal means of human reproduction. ……

used to create a large cultural relic (遗产) reproduction project in the world. People in Qingdao... cultural relic (遗产) reproduction project in the world.  ……

reproduction permit in China. “冷冻卵子”即取母体健康时的卵子(harvest eggs from the ovary)冷冻，阻止卵子随人体衰老，待想生育时取出冷冻的卵子使用。 ……

reproduction (繁殖) rates. Some groups, such as Africans, have a higher reproduction rate. Their higher reproduction would make them a larger proportion (比率) of the global population. People with lighter ……

is very good for the growth of viruses."Warm winter weather is more beneficial to virus reproduction ……

Sources: Olivia Holmes and Hany Farid of Dartmouth College; Martin S. Banksof University of California, Berkeley; ACM Transactions on Applied Perception Graphic: Helen Lee McComas, TNS高考词汇identify vt ……

the brothers' achievement.This Wednesday a US$12 million reproduction of the Wright brothers' Flyer... and home-made aircraft fans, who are eagerly awaiting the first journey of the reproduction Flyer ……

What does sex do for you?SCIENTISTS have long wondered why organisms bother with sexual reproduction. It's a lot less fuss having females clone themselves, which is how asexual reproduction works.Q ……

contagious is the virus?The basic reproduction number (R0, 基本传染数) shows the transmission potential (传播可能性) of a disease. The more contagious, the higher the R0 number.The basic reproduction number (R0 ……

of reproduction, they describe middle and upper class values: not many children, different attitudes towards... reproduction," says Martine.1. According to the passage, Brazil has cut back its population growth ______ ……

life to enhance life is immoral. That fear about the reproduction of humans is serious and some people..." to ensure that such research "never opens the door to the use of cloning for human reproduction ……

“I don’t do what I do to control perception or make people think a certain way about me. ‘Well...问及公众的言论是否给她带来困扰时，Stewart说她喜欢直言不讳，从不在意外界的眼光(perception)，即便明知有些话会惹恼对方(piss sb off)，她也从不刻意取悦。对于Stewart来说，呈现(present)一个真实的自己比媒体面前的完美形象更重要。 ……