I.on [美 ɑn, ɔn, 英 ɒn]介词on often appears as the second element of certain verb structures in English (count on, lay on, sign on, etc). For translations, see the relevant verb entry (count, lay, sign, etc).
II.in [美 ɪn, 英 ɪn]副in often appears as the second element of certain verb structures in English (close in, hand in, stand in, etc). For translations, see the relevant verb entry (close, hand, stand, etc).
Accomplices will often home in on clothing in colors or styles for which the contestant has expressed specific distaste or clothing similar to that which they have just thrown out.
His work on software contracts provides a more careful accounting of blame, thereby helping programmers quickly home in on the faulty part of a software system.