II.off [美 ɔf, ɑf, 英 ɒf]副off often appears as the second element of certain verb structures in English (break off, pay off, take off, etc). For translations, see the relevant verb entry (break, pay, take, etc).
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).
The black-painted aircraft with no identity markings attracts curious locals, and officials and military police are quickly dispatched to cordon off the area.
The local government initiated an emergency response plan and sent a work team to clean up the spill and cordon off the contaminated area to prevent the pool from expanding.
