ph indicator ph 氢离子负指数指示剂
pH value pH 酸碱度 ; 氢离子值
pH drop pH 酸度增加
pH control pH 酸碱度控制
pH decline pH 酸度增加
pH depression pH 酸度增加
pH decrease pH 酸度增加
pH change pH 酸碱度变化
Experts say the ability to take up lead is reduced when the pH level is above six and a half.
VOA: special.2009.06.09
He did his Ph.D. He managed to get a fellowship, and he came to the UK all the way from New Zealand.
他取得了博士学位后,离开了新西兰去英国谋得一个研究职位。
so ideally I sort of want to get a Ph.D with sociology so that I can go international travel,
所以,理想状态下,我有点想要拿到社会学的博士学位,这样我就可以跨国旅游了,
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