How do you say
He trained hard for three months, exercising two hours a day, and ended up with an excellent performance in the marathon.
..in Chinese?
他坚持每天训练两个小时，为期三个月，终于在马拉松比赛中获得了优异的成绩。
tā jiān chí měi tiān xùn liàn liǎng gè xiǎo shí ， wéi qī sān gè yuè ， zhōng yú zài mǎ lā sōng bǐ sài zhōng huò dé le yōu yì de chéng jì 。
How do you say "After three months of training, he improved his sprint time." in Chinese?