强有力的英文：
strong
forceful

参考例句：

a lusty cry.
强有力的吼叫

I grant a sledge-hammering sort of merit in him.
我承认他身上有种强有力的优点。

Sarcasm became a sledge hammer in their debate.
在他们的辩论中，讽刺成为强有力的武器。

The dockers' strike was so powerful a demonstration that the shipowners hung out the white flag.
码头工人的罢工是一场强有力的示威，船主们只好认输。

Against the belief in such abrupt changes, embryology enters a strong protest
对于这种突然变化的信念，在胚胎学上提出了强有力的反证。

stiff resistance
强有力的抵抗

a knockdown blow.
强有力的一击

Dynamite is a powerful explosive.
炸药是一种强有力的爆炸物。

Having great power,esp of the body
强有力的(尤指身体)

He is a potent ruler.
他是一个强有力的统治者。

strong是什么意思：
adj. 强壮的；强大的，强劲的；有力的；牢固的；坚强的；坚决的；浓的；激烈的
adv. 强烈地

The Battle is to the strong
强者必胜

strong extremum
强相对极值

Strong reasons make strong actions
理由充足,行动就坚决

The competition is very strong this time.
这次的对手非常强。

Is this why the Yen is so strong?
这是日元如此强劲的原因吗？

forceful是什么意思：
adj. 强有力的；有说服力的；强烈的；坚强的

by (main) force
用蛮力, 全靠气力; 以最大的力气

The force is spectacular!
这个瀑布很壮观！

resultant force
合力

The threat will force greater dispersion of their forces.
恫吓将迫使他们把兵力铺得更广。

The tension force, shear forces (including pushing force, cutting force and friction force), impulse force, hydrodynamic drag on the suction pipes, and the force resulted from the pressure difference, etc, are the main forces for detail discussion in this paper.
详细讨论了主要作用力：在波浪补偿器作用下的缆绳拉力、耙头与海床间的土壤剪切力、作用在耙吸管上的水流阻力及由于压力差在耙头处产生的推动力等。