Each of these life - sustainng agents begins as a stem cell , a sort of hematological embryo.这三种维持生命的要素都起源于干细胞.干细胞是血液的胚胎.Dolly's legacy includes the possibility of making patient - specific embryonic stem cell lines...
These fires create convection funnels, and throw a lot of particles into the upper atmosphere.这些火焰造成了对流漏斗,把许多微粒抛向上层大气。Convection can be of two types: natural convection and forced convection.对流可分为两类, 即 自然对流和强制对流.One of t...
Intervals may be modified by the addition sharps , flats or naturals by the side of numerals.音程可以通过在数字旁添加升降或还原号来改变.Sharps or flats next to individual notes only apply within the measure.高音或低音符号只能在相近的小节内使用.A difficult pia...
He is aiming for the 100 metres world record.他志在打破100米世界纪录。Ferris has a rare ability to record her observations on paper.费里斯具备把自己的观察结果记录下来的超强能力。There have been record bankruptcies and remorselessly rising unemployment.破产...