The disadvantages of the pharos and avigation obstacle lights are analysed in the paper.详细分析目前航标灯和航空障碍灯存在的主要问题.I stepped back and analysed the situation.我抽身出来，从局外人的角度分析了形势。The present world crisis should in principle be ...
Peel a thick-skinned orange and square off the ends with a sharp knife.剥开一只厚皮橙子，用锋利的刀将两端削去使它呈方形。Therefore, TRF 2 may protect chromosome ends by maintaining the correct structure at telomere termini.因此, TRF2可保护染色体末端保持正确的结...