Changes that take place in the physical world are in variably the result of forces.

　　發(fā)生在物質(zhì)世界的所有變化無(wú)一不是力的結(jié)果。

　　Other associated neurological symptoms, such as numbness and weakness, are variably present.

　　其他的相關(guān)神經(jīng)癥狀，如麻木和無(wú)力等，表現(xiàn)則個(gè)不相同。

　　The stomatal index in the adaxial epidermis changed variably during development of cotyledons.

　　上表皮氣孔指數(shù)的變化規(guī)律不明顯。