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...
这本书写得很好，插图生动形象，说明文字简练精辟。The book is well written, properly illustrated and excellently captioned.威利·勃兰特1970年访问东德，书写了历史新篇章。Willy Brandt made history by visiting East Germany in 1970.安东尼·海曼在此就他那本关于阿富汗的书写了书评。His book about ...