【計(jì)】 collision rate

碰的英語翻譯：

bump; meet; run into; touch

頭的英語翻譯：

beginning or end; cobbra; conk; crumpet; end; first; garret; hair; head
leading; nob; noddle; pate; sconce; side; top; twopenny
【醫(yī)】 capita; caput; cephal-; cephalo-; head; kephal-; kephalo-

率的英語翻譯：

frank; hasty; lead; modulus; quotiety; rash; rate; ratio; usually
【醫(yī)】 rate
【經(jīng)】 rater.