For an encore, he sang an unaccompanied folk song.应观众再唱一曲的要求, 他清唱了一首民歌.It is estimated that every year 50 unaccompanied children arrive in Britain.据估计，每年有50名儿童独自来到英国。Unaccompanied bags are either searched or removed.单独运送...
它在发酵过程中起触媒的作用.It acts as a catalyst in the process of fermentation.气雾化粉末触媒氧等杂质含量远低于水雾化.The content of impurities in water - is greater than that in gas - atomization.触媒转换器成为诱人的偷窃目标是因为它们很容易就得手.The converters are inviting ...