In heavy concentrations, ozone is irritating to the eyes, nose and throat.高浓度的臭氧会对眼睛、鼻子和咽喉有刺激作用。Large concentrations of capital were in the hands of merchants.大量资本集中在商人手里.The latest data showed that global ozone concentr...

concentrations的音标：concentrations的英式发音音标为：[kɒnsənt'reɪʃnz]concentrations的美式发音音标为：[kɒnsənt'reɪʃnz]...

n.集中( concentration的名词复数 )，专心，关注，浓度...

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...