录音原话是扎克伯格 promised to put 99 percent of his Facebook shares ... into a philanthropic project,但考题给出的是他把facebook收益的99%，即目前的US$45 billion已经捐给慈善项目。这就出现了问题，99%的收益目前算来虽然是US$45 billion，但这个数字是在变化的，而捐赠是承诺，具体捐赠额会随收益变化而变化。

[重点难点]
对英语动词的时态及相关词语表述保持敏感。

[录音原文]
In welcoming the birth of his first child, Mark Zuckerberg posted a photo of his family along with a letter, in which he promised to put 99 percent of his Facebook shares, currently worth US$ 45 billion, into a philanthropic project.