核黄素,经光解作用而生成含有自由基的产物.Riboflavin undergoes photodecomposition with resulting production of free radical containing products.特别是他们建议在使用核黄素前去除角膜上皮.In particular, they suggest removing the epithelium before the application o...
Clubbing baby seals to death for their pelts is wrong.为了获得海豹皮而用棍棒打死幼海豹是不道德的。Check seals on fridges and freezers regularly.定期检查冰箱和冷冻柜的密封装置。They saw many seals off the Coast of Alaska.他们在阿拉斯加海岸外看见很多海豹....
The boy was cheeky and casual.那个小男孩有点放肆，随随便便的。Laura glanced at Grace, expecting a cheeky riposte.劳拉匆匆瞥了格雷斯一眼，想着他会厚着脸皮巧妙地反驳一下。Martin gave her a cheeky grin.马丁冲着她调皮地笑了笑。...
We need helpers of all types, engineers, scientists (e.g. geologists) and teachers.我们需要各方面的帮手：工程师、科学家（例如地质学家）和教师。a little posse of helpers一小伙帮忙的人We depend solely upon our voluntary helpers.我们完全依靠我们的志愿者。...