他们的论据很有说服力, 我也不得不同意。用英语怎么说？

他们的论据很有说服力, 我也不得不同意。

Their arguments were irresistible;I had to agree.

their

pron. 他（她，它）们的，在提及性别不详的人时，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

arguments

n. 争论( argument的名词复数 )，争吵，说理，论据；

例句
Such is the size of the problem that these arguments are purely academic.
问题的实情在于这些论点纯属空谈。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

irresistible

adj. 无法抗拒的，诱惑人的，具有非常的魅力的，不可抗拒，不可阻挡；

例句
It proved an irresistible temptation to Hall to go back.
事实证明回去对霍尔是个不可抗拒的诱惑。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

agree

vt.& vi. 同意，赞

例句
You and I are going to have to agree to disagree then.
那你我只能各自保留不同意见了。