效忠的英文：
vow loyalty and devotion to

参考例句：

a faithful employee
效忠的雇员

An oath of allegiance
效忠宣誓

Do [render] homage
宣誓效忠

Vassal homage [fealty]
臣下的效忠

He swore fealty to the king.
他宣誓效忠国王。

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

He took an oath of fealty to the king
他宣誓对国王效忠。

He swore allegiance to the throne.
他宣誓效忠国王。

Pledge allegiance to the king
发誓效忠国王

Swear(an oath of)allegiance to the Queen
宣誓效忠女王.

vow是什么意思：
n. 誓言，誓约；发誓；许愿
v. 起誓，发誓；郑重宣告

But if you refrain from making a vow, you will not be guilty.
你若不许愿，倒无罪。

Vows made in storms are forgotten in calms
激动时发的誓言,平静时便忘却

I vowed that I love you.
我郑重宣告我爱你。

loyalty是什么意思：
n. 忠诚；忠心；忠实

That was the brute loyalty to the herd.
那是对群落的一种本能的忠诚。

They are aliens of equivocal loyalty.
这些侨民的忠心很可疑。

The virtues of loyalty,courage,and truthfulness.
忠诚，勇敢和诚实的美德。

devotion是什么意思：
n. 热爱；奉献；忠诚；信仰

Talented in or devoted to music.
有音乐才能或献身音乐的。

I have a loving and devoted husband.
我有个深情且忠诚的丈夫。

She has an inflexible devotion to an ideal.
她具有对一种理想坚定不移的献身精神。