合唱: chorus, to chorus...
秩序: order (orderly), order (sequence), social order, the state (of society)...
棉花: cotton...
外资: foreign investment...
合并: to merge, to annex...
入境: to enter a country...
锲而不舍: to chip away at a task and not abandon it (idiom); to chisel away at sth, to persevere, unflagging efforts...
针: needle; injection...
