n.不中用的人;
adj.无价值的;
例句:
On no account can we ignore the value of knowledge.
我们绝对不能忽略知识的价值.
On no account ( do you ) forget to lock the door.
千万别忘了锁门.
On no account should you leave the door unlocked.
你无论如何也不应该不锁门.