坚决的英文：
firm
resolute
determined

参考例句：

A stalwart support
坚决的拥护

They kept up a sturdy opposition to the plan.
他们坚决反对这个计划。

We stand firmly for the maintenance of world peace, for the relaxation of international tension and for arms reduction.
我们坚决主张维护世界和平，缓和国际紧张局势，裁减军备，

Schryhart straightened up determinedly and offensively
希哈利坚决地、无礼地挺起了身子。

unabashed, Tu Hsin-to answered in a cool, firm voice
但是杜新箨冷冷然坚决地回答

The army adamantly refused and insisted that there was no recourse but war
陆军坚决拒绝，并坚持除战争外别无它路。

School regulations still included the wearing of a uniform and the teachers took a very firm line on this.
学校规章制度仍然要求穿校服，而且老师们对此态度很坚决。

Nixon, whatever his travail, would see it through
尼克松置他的痛苦处境于不顾，坚决要把这件事干到底。

I would like to emphasize that civilized society in the world of today should reject firmly any cult in any form.
我想强调，当今文明社会应该坚决拒绝任何邪教言行。

But another feeling rose and triumphed: something hard and cynical, self-willed and resolute.
可是另外一种感情浮现出来，胜利了。那是一种冷酷而愤世嫉俗的、任性而坚决的感情。

firm是什么意思：
n. 商号；企业
adj. 坚定的；坚固的；强有力的；确定的；坚挺的；严格的
v. （使）坚固；变坚实；加强；使坚定；回升
adv. 坚定地

Are the firm's finances sound?
这家公司的财务状况可靠吗?

His step was not as sharp and firm.
他的脚步不再像从前那样敏捷、坚实。

To become firm or gelatinous; congeal.
凝固凝结或变硬；冻结

determined是什么意思：
adj. 下定决心的；坚定的
v. determine的过去式和过去分词

He was determined to helm the exhibition.
他决定负责此次展览会的领导工作。

She is determined to make it to the top.
她决心要出人头地。

My father was a man of determination.
我父亲是一个果断的人。