非球面的与球状体略微不同,只有很小偏离, 如镜片.Varying slightly from sphericityand having only slight aberration, as a lens.一种叫“博克球状体”(Bokglobule)的冷分子氢“小金块儿”形成逆着星团的剪影.A nugget of cold molecular hydrogen , called a Bok globule , is silhouetted...
Goods may be sent by surface mail or airmail.货物可通过平寄或空运发送。Affix the blue airmail label and leave the rest to us.贴上蓝色的空邮标签，其余的事情交给我们。Write "By Airmail" in the top left hand corner.在左上角写上“航空邮递”....
关键是你的饮食要多样化，并保持均衡。It is essential that your diet is varied and balanced.我们一点都不抵触多样化；实际上，我们需要多样性更丰富一些。We have nothing against diversity; indeed, we want more of it.多样化使生活更有情趣！Variety is the spice of life!...