In the worst - case scenario, UV light mutates DNA, leading to premature aging or skin cancer.在最差的情况下, 紫外线能使DNA发生突变, 于是导致提前老化或皮肤癌.Its capacity to fuse Ehrlich's ascites cells remained at 100 % through 2 min. of UV.其...
The offenders lapsed into a sullen silence...那些冒犯者都闷不作声了。I was served by a sullen-faced youth.一个闷闷不乐的年轻人接待了我。Bob looked pale and sullen.鲍勃脸色苍白，闷闷不乐。He looked up at the sullen sky.他抬头看了一眼阴沉的天空。All my attempts to amuse the...
Want to use auxiliary illuminant to build atmosphere additionally.另外要利用辅助光源营造气氛.High illuminant efficiency, long life.发光效率高, 耗电少,寿命持久.Above all method is compensatory and artificial illuminant.首先的办法是补充人工光源....