The ratio between a and b
甲乙之間的比率
?? 詞語組成解析
the
[e?]
art. 指已提到的人（物）;指說話人與聽者已知的人（物）;用于獨一無二的事物前;與形容詞最高級和序數(shù)詞連用;
ratio
['rei?i?u]
n. 比，比率;比例;系數(shù);
vt. 求出比值，除，使…成比例;將（相片）按比例放大[縮小];
between
[b?'twin]
prep. 在…之間;私下，暗中;在…中任擇其一;來往于…之間;
adv. 當中，中間;
and
[?nd, ?n,?nd]
conj. 和，與;而且;于是，然后;因此;
??? 情景例句
Many students are working at part time jobs.
許多學生兼職打工。
Take care and give my by best to your parents.
多保重，代我向你的父母問候。
but a medicine that had worked so well in one form of illness would surely be of equal benefit in another,
只知道一種藥對一種病有好處，肯定對另一種病也會有好處。