on; on top; upon; first (of two parts); previous or last (week etc); upper; higher; above; previous; to climb; to go into; above; to go up; to attend (class or university); third tone of putonghua[cedict]
它
tāㄊㄚ
it (used for things)[cedict]
是
shìㄕˋ
is; are; am; yes; to be[cedict]
光速
guāng sùㄍㄨㄤ ㄙㄨˋ
the speed of light[cedict]
对撞机
duì zhuàng jīㄉㄨㄟˋ ㄓㄨㄤˋ ㄐㄧ
a particle collider[cedict]
他
tāㄊㄚ
he; him[cedict]
就是
jiù shìㄐㄧㄡˋ ㄕˋ
(emphasizes that sth is precisely or exactly as stated); precisely; exactly; even; if; just like; in the same way as[cedict]
个
gèㄍㄜˋ
individual; this; that; size; classifier for people or objects in general[cedict]