Barium is found in some oilfield brines in concentrations greater than 100 mg / litre.在有些油田卤水中,钡的浓度大于100毫克/升.At lower concentrations they may even be stimulants of cell division.在浓度较低时,它们甚至能促进细胞分裂.Methods Three different...
The bank has been too slow in loosening the purse strings.银行一直迟迟不愿放开资金。The ties that bind them together are loosening.将他们紧密联系在一起的纽带正在弱化。The runners are loosening up their muscles before the race.赛跑前运动员们正在放松肌肉....
A grey miasma, neither cloud nor mist low in the sky and the atmosphere was stifling.一些似云非云,似雾非雾的灰气低低的浮在空中,使人觉得憋气.As time went on, his ambition to be part of the US Supreme Court faded in a miasma of alcohol and despair....