用法:
1 of, giving, receiving or showing preference(2) 优先的; 给予优先的; 得到优先的; 优待的:
preferential import duties, tariffs, etc, ie favouring a particular group, country, etc 特惠关税（优待某团体、 国家等）.

用法:
2 (idm 习语) give sb/get preferential `treatment treat sb/be treated more favourably than sb else 偏向某人[得到优待]:
Nobody gets preferential treatment in this office! 本办事处无论对谁均一视同仁!

• as well(either)
• as well(just as well)
• as … as(more … than)
• as … as(no less … than)
• as … as(so … as)
• as(because, for, since)
• as(for)
• as(like)
• as(so)
• as(so)
• as(such as)
• as(when, while)
• as(which)
• ashamed(shameful)
• ask leave(take leave)
• ask(ask for)
• asleep(sleepy)
• assure(ensure)
• at a guess(by guess)
• at a loose end(at loose end)
• at a standstill(to standstill, to a standstill)
• at a stretch(at full stretch)
• at a time(at one time)
• at a time(at the time)
• at all costs(at any cost)