对撞机

a particle collider

right / correct / couple / pair / towards / at / for / to face / opposite / to treat (sb a certain way) / to match together / to adjust / to fit / to suit / to answer / to reply / classifier: couple

right; correct / towards; at; for / concerning; regarding / to treat (sb a certain way) / to face / (bound form) opposite; facing; matching / to match together; to adjust / to fit; to suit / to answer; to reply / to add; to pour in (a fluid) / to check; to compare / classifier: couple; pair

to collide head-on

to knock against / to bump into / to run into / to meet by accident

(of an airplane) to collide (with another plane midair) / to crash

(bound form) machine; mechanism / (bound form) aircraft / (bound form) an opportunity / (bound form) crucial point; pivot / (bound form) quick-witted; flexible / (bound form) organic