假如我们有了小孩，我们会真正陷入困境。If we had a child, we'd be in really dire straits.假如能买得起，我就会有4台电视机。If I could afford it I'd have four television sets.假如得不到解决，像休·戈弗雷这样的人就会一直坚持斗争下去。Absent a solution, people like Sue Godfrey w...
质子的质量几乎是电子的2,000倍。Protons are nearly 2000 times as heavy as electrons.自由基是一种具有未配对电子的分子碎体.A free radical is a molecular fragment having an unpaired electron.在物质中的贯穿能力,都是和电子的动能E有关的.Penetration in matter depends on the kine...