OBJECTIVE to comparing the contents of emodin and chrysophanol in Rheum Palmatum L. of different plant periods and cultivated methods, to offer a scientific basis for GAP.

目的测定不同生长期限和不同栽培方法的掌叶大黄中大黄素和大黄酚的含量，为大黄的GAP规范化种植提供参考依据。

youdao

Remove L shape bracket from one side of air gap drain.

从气隙排放装置的一侧拆卸l型支架。

youdao

To narrow the racial gap in swimming, the L.A.-based Amateur Athletic Foundation gives grants to swim facilities in Southern California.

NPR: L.A. Effort Narrows Swimming's Racial Gap