The reaction conditions on oxidation of 2 - methylpyridine to 2 - acid by oxidation of potassium dichromate were studied. 研究了以2-甲基吡啶为原料,以重铬酸钾为氧化剂,利用化学氧化法合成 2- 吡啶甲酸的反应条件.
Unfortunately, Grandma always seems to awaken at awkward moments.不幸的是，奶奶好像总是醒来的不是时候。Malcolm worked up the nerve to ask Grandma Rose for some help.马尔科姆鼓起勇气请罗丝奶奶帮点忙。We listened with bated breath to Grandma's stories o...
Basing himself on the realities of his life,the painter successfully integrated realism and artistic exaggeration.画家根据自己的现实生活,成功地把现实主义和艺术夸张结合起来。The painter had initialled the picture at the bottom.画家在画作的底部签下了姓名的首字母.Georg...
如果你孩子的体温上升，就用海绵蘸上温水轻轻地擦拭她的身体。If your child's temperature rises, sponge her down gently with tepid water.人们有可能察觉不到体温的过低。There is the possibility that hypothermia can go unrecognized.小剂量的止痛药对于降低体温非常有用。Pain-killers are...