1.subject to 使服从；使遭受

And standards do not solve everything: RFID, like any other technology, is subject to the laws of physics.
同时，标准也不是能解决所有的事情—像其他技术一样，RFID也受到物理学的制约。

Although these targets would not be internationally binding, they would be subject to outside verification.
虽然这些目标不具有国际约束力，但它们将受到外界监督。

2.pledge to 保证

He would keep his pledge to the utmost of his power.
他将极力信守他的誓言。

In the Second Training we pledge to practice generosity and not support social injustice and oppression.
在第二项训练中，我们保证，实践宽宏大量，不支持社会不公正和压迫。

3.because of 因为；由于

It is mainly because of my fault.
这主要是由于我的过错。

His business went under because of competition from the large corporations.
由于大公司的竞争，他的生意陷入了困境。
4.claim to 要求

She relinquished her claim to the property.
她放弃了对财产的要求。

If the goods were damaged in the post,you can put in a claim to the post office.
物品在邮寄过程中如有损坏，可向邮局提出索赔。