节食一个月后

好的，我对这个事情感觉非常满意。今年开始的时候（or 今年年初），我的体重太重了(It is not wrong, but omitting "的体重" makes it more concise)，一共有13英石9磅。节食一个月后 （还有出了一些错误后）我的体重有是13英石1磅，一共减掉了8磅。专家说你应该打算每个月减掉8到10磅，所以我走的方向是正确的。可是我认为我每个月本来能减掉更多的体重，我依然只是锻炼太少了，要是我多锻炼，我想这个月我有可能减掉10到12磅。如果我不能，这不是一个问题(not wrong but not natural. I guess “这不算什么” is more natural)，只要我依然继续减肥，这就够了.
Ok, I'm fairly pleased with this. I started the year weighing a whopping 13st 9ibs. After one month of dieting and a few slips up, I now weigh 13st 1lb, a total loss of 8lbs this month. The experts say you should aim to lose 1-2lbs a week, so I'm right on track. I still think I could lose a bit more. I'm still not getting enough exercise, if I up that a bit more, I reckon I could push for a loss of 10-12lbs this month. Still even if I cant, as long as I continue to lose weight, that's okay too.

Well done! 祝你减肥成功。

节食一个月后

好的，我对这个事情感觉非常满意。今年开始的时候，我的体重太重了，一共有13英石9磅。节食一个月后 （还有出了一些错误后）我的体重有13英石1磅，一共减掉了8磅。专家说你应该打算每个月减掉8到10磅，所以我走的方向正确。可是我认为我每个月能减掉更多的体重，我还是锻炼太少了，要是我多锻炼，我想这个月我有可能减掉10到12磅。如果我不能，这不是一个问题，只要我依然继续减肥，这就够了.
Ok, I'm fairly pleased with this. I started the year weighing a whopping 13st 9ibs. After one month of dieting and a few slips up, I now weigh 13st 1lb, a total loss of 8lbs this month. The experts say you should aim to lose 1-2lbs a week, so I'm right on track. I still think I could lose a bit more. I'm still not getting enough exercise, if I up that a bit more, I reckon I could push for a loss of 10-12lbs this month. Still even if I cant, as long as I continue to lose weight, that's okay too.g

依然，是“和往常一样”的意思，例如，这么多年过去了，你依然这么美丽。

文章很好，语言很流畅，只是个别词语用的不当。