用法:
1 all the members of a Church who are not ordained clergymen; laymen （别於神职人员的）俗人; 普通信徒. Cf 参看 clergy.

用法:
2 people outside a particular profession (contrasted with those inside it) 门外汉; 外行.

• once again(once and again)
• once upon a time(once in a while)
• once(as soon as)
• once(one day, some time)
• one after another(one after the other)
• one at a time(one by one)
• one day(some day)
• one of whom(of whom one)
• one or other(one or the other)
• one's kindness(the kindness)
• one's last words(the last word)
• one's neglect in doing sth(one's neglect to do sth)
• one's purpose(the purpose)
• one(soul)
• one(that)
• one(you)
• oneself(personally)
• only a(the only)
• only(one and only)
• only(only that)
• onto(on to)
• open sth at(open sth to)
• open(unfold)
• opportunely(out of season)
• opposite(in front of)