stood in the doorway diffident and abashed ;, 羞怯而又局促不安的站在門(mén)口;
+diffident hydrodynamic
1 . 不同水動(dòng)力
the simulation test can study the movement law of pollutant diffusion under the diffident hydrodynamic condition .模擬試驗(yàn)?zāi)軌蚋玫匮芯坎煌畡?dòng)力條件下污染物的擴(kuò)散運(yùn)移規(guī)律。