降顺的英文：
to yield and pledge allegiance to

yield是什么意思：
v. 出产；带来；给予；让出，放弃；屈服；投降
n. 产量；收获量；收益

The enemy yielded.
敌人投降了。

yielding material gain or profit.
产生物质利益和利润。

To give or yield permission to or for.
同意给予批准或许可

pledge是什么意思：
n. 抵押；典当品；许诺；誓言；信物
v. 保证，发誓；用…抵押

The property was pledged as security for loans.
这地产被当作贷款的抵押。

He pledged to fulfil his trust.
他保证履行责任。

You must not pledge your own health
切不可把健康作孤注一掷

allegiance是什么意思：
n. 忠诚

Render homage,obedience,allegiance,etc
表示敬意、顺从、效忠等

Seduction from morality,allegiance,or duty.
道德败坏;不忠;玩忽职守

Bound to give such allegiance and services to a lord or monarch.
臣服的臣民被限制向领主或君主臣服和服役的臣民