Clinical trials on people are conventionally divided into three phases , each more rigorous and wide-ranging than its predecessor .
對人的臨床實驗照慣例分為三個階段,每一個階段都比前一個階段更嚴格更廣泛。
The alabaster beluga 's dark cousin , the narwhal is not a conventionally beautiful animal .
作為雪花白鯨的黑色堂兄,獨角鯨并不是一種傳統(tǒng)的美麗動物。
Our review indicates that there is currently no evidence to support the selection of organically over conventionally produced foods on the basis of nutritional superiority .