以太,能媒一种在以前被假定为电磁波的传播媒质并具有''.'绝对'.''连续性 、 ''.'高度'. ''弹性的极其稀薄的媒体. An all - pervading , infinitely elastic, massless medium formerly postulated as the medium of propagation of electromagnetic waves.
Formal, exact and obstinate, he was also cold, suspicious, touchy and tactless.严肃、严谨、倔强的他同时又冷漠、多疑、敏感、不会变通。She is very touchy about her past.她对自己的过去非常敏感。Don't be so touchy.别这么小心眼。...
鸟类在伯赛的保护区尤其受到保护。The birds are additionally protected in the reserves at Birsay.正在考虑将这个地区指定为保护区。The district is under consideration for designation as a conservation area.那个岛继续作为濒危物种的保护区.This island is maintained as a san...
This organism secretes a few extracellular products including capsular polysaccharide ( CPS ), protease, cytolysin and phospholipase.创伤弧菌会表现许多细胞外的产物,包括荚膜多醣体 、 蛋白酶 、 细胞溶解毒素与磷脂酶....