"Free radicals — like the kind formed from sun exposure — damage the membrane of skin cells, potentially allowing damage to the DNA of that cell," says Heller.
“自由基(比如由阳光照射而形成的粒子)会损害皮肤细胞膜，更会对细胞DNA构成潜在的威胁。”Heller说。
What looks like an artist's rendering of the sun is actually a human egg cell.
这张看上去像艺术家创作的太阳图，实际上是人类的卵细胞。
Pollutants, sun, stress, poor diet, alcohol and some medications can cause our bodies to produce free radicals which can lead to cell damage.
污染物，阳光，压力，不良饮食习惯，酒精和一些药物可能会导致我们的身体产生自由基，可导致细胞损伤。
Sun-shading can promote the growths of leaf age and tiller, and the leaf-area. The negative impacts on length of fibre cell, coefficient of flexibility, ratio of length and diameter.
遮阳处理能促进叶龄、分蘖的增长，但不利于叶面积的增长，对纤维细胞的长度、柔性系数、长宽比等也产生不良影响。
Zheng S. -M. , Wang S. -Q. , Ma J. , Kong L. -N. , Sun X. -M. , Li S. Mental status of myocardial infarction patients undergoing autologous bone marrow stem cell transplantation.
郑淑梅，王霜秋，马静，孔令娜，孙雪梅，李双自体骨髓干细胞移植治疗心肌梗死患者心理状态调查分析。
This helps to reduce wind and sun exposure. A solar cell is installed on the sunroof and provides sufficient energy to fuel a notebook.
更有特色的是这个公共休闲区，有一块太阳能电池是安装在天窗，并可以提供足够的能量来供应笔记本电脑工作。
SETTING AND PARTICIPANTS:Completed by the Department of Preventive Medicine, College of Public Health, Sun Yat Sen University with object of poorly differentiated CNE2 cell strain.
地点和对象：由中山大学公共卫生学院预防医学系完成，对象为低分化CNE2细胞株。
SETTING AND PARTICIPANTS:Completed by the Department of Preventive Medicine, College of Public Health, Sun Yat Sen University with object of poorly differentiated CNE2 cell strain.
地点和对象：由中山大学公共卫生学院预防医学系完成，对象为低分化CNE2细胞株。
应用推荐