on no account

1.hand sth down to sb.(作为传统)传下，传给某人
His father handed the silver and jewels down to him.他父亲把银器和珠宝传给了他。
2.on no account决不
On no account are visitors allowed to feed the animals in the zoo.在动物园里，游客一律不准给动物喂食。
3.fall back on求助于(depend on)
When I lost my job, I had to fall back on begging for money.当我失去工作时，我不得不出去讨钱。
4.I'm on your side.我站在你这边。(我全力支持你)
5.He lacks courage.他缺乏勇气。