But she does recognize strength in cheng 's argument .

但她也承认cheng的论证确实很有力。

Prof cheng agrees the pisa results reflect a broad cross section .

程教授认为pisa的测试结果能反映了大致情况。

Why phy906 works isn 't entirely clear , dr. cheng says .

郑博士说，phy906为何会起作用尚不完全清楚。

And I also want to add making the legal system , as cheng said , much more transparent and independent .

另外我还想补充一点，就是像李成所说的，大大增强司法系统的透明度和独立性。

Although only professional artists were invited to the strictly closed-door event , cheng was detained by police for his " pornographic art " .

警方以表演“色情艺术”拘留了成力，虽然仅有一些专业艺术家被邀请参加这场严格进入的表演。