complacency
(also complacence ) n ~ (about sb/sth) (usu derog 通常作贬义) calm feeling of satisfactionwith oneself, one's work, etc 自满; 自得
There's no room for complacency; we must continue to try to improve. 我们不能自满, 必须继续努力改进.
No, just a few. For example, most Canadians say news [nju:z], but Americans say [nu:z]. We mainly use American words, but we use quite a lot of British words too. We fill our cars with gas, which is American, but we turn on the tap which is British En