Horsehead Nebula: New stars have already formed inside part of it.马头星云: 新的?星已经在其内部形成了.Directly below Alnitak, a close inspection will reveal the Horsehead Nebula.经过仔细查看就可以发现紧挨着参宿一的下方就是马头星云.Light takes about 1500 years to...
Near the end of Devonian times, thirty percent of all animal life vanished.在泥盆纪末期，30％的动物物种都灭绝了。The contact relationship between Silurian and Devonian is parallel unconformity.泥盆系与志留系之间为平行不整合接触.Blooming of Bacteria and Al...
在核武器试验中他们暴露在放射性尘埃之下。They were exposed to radioactive fallout during nuclear weapons tests.他周末都泡在布满尘埃的旧书店里.He spent his weekends poking around dusty old bookshops.雨将使尘埃平息.The rain will settle the dust....
This further refines the visual style so that it reflects key behaviors and information.我们进一步使视觉风格完善,从而可以体现和反应关键的行为和信息.Gold refines in the fire and man in trouble.金凭火炼,人凭苦练.The concept site plan further refines and detai...
The O - crossagglutination can be elimina - ted , if H - antisera agglutinate with OH - antigen.用H - 抗血清与OH - 抗原的凝集反应,可以排除O-交叉凝集.Objective To purify the immunoglobulin from Ricefield eel , and to prepare the rabbit polyc...