adv. 一次,一趟;一倍;曾經;一旦;
conj. 一旦…就…;一經;
n. 一次,一回;
?? on=one一+ce次 → 一次
"Once in the bloodstream, the bacteria adhere to the surface of the red cells."
細菌一進入血液里,就附著在紅細胞表面上。
近義:heretofore, occasionally, onetime, previously, sometimes, thereinbefore
n. 禮貌
近義:behavior, politeness, refinement, culture, education
反義:impoliteness, rudeness, scurrility, solecism, uncouthness, unkindness