For the different part of Tripterygium wilfordii obtained in summer,the content range of triptolide in its given order was whole root,root bark,debark root,stem and leaves respectively.
Bad weather, such as the heavy summer rains, after drouth, which saturate ploughed soil, reduce soil shear strength, facilitate masse soil movement, and instigate gullying.
The spring, the summer, The childing autumn, angry winter, change Their wonted liveries;and the mazed world, By their increase, now knows not which is which.