碰头率

【计】 collision rate

碰的英语翻译：

bump; meet; run into; touch

头的英语翻译：

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

率的英语翻译：

frank; hasty; lead; modulus; quotiety; rash; rate; ratio; usually
【医】 rate
【经】 rater.