Air pollution in the city had reached four times the acceptable levels.

这座城市空气污染程度曾高达可接受标准四倍。

The synthesis of fluorine substituted saponite was explored and suceeded under mild temperature hydrothermally.Microwave-hydrothermal synthesis of sapontie was performed first time.

对于层状材料微波水热快研究也进行了首次探索，发现可以在可接受条件下得到具有三八面体结构皂石。

Please note that it is perfectly acceptable to have a Pembroke Welsh Corgi that is black and tan with no white, but a Pembroke Welsh Corgi that is black and white with no tan present is a mismark.

请注意它是可接受PWC,它有黑色和褐色无白色，但是PWC这又黑色和白色无褐色是错误标记。