This is the first time she has experienced disappointment.

这是她第一次感受到失望。

《柯林斯英汉双解大词典》

This is the first time I've sat behind the wheel since the accident.

这是出车祸以来我头一次坐在方向盘前。

《牛津词典》

This is the first time the company has ventured into movie production.

这是这家公司首次涉足电影制作。

《牛津词典》

This is the first time scientists have successfully passed on a foreign gene to a future generation.

VOA: special.2009.06.23

This is the first time we've ever driven to Los Angeles.

这是我们第一次开车到洛杉矶。

洛杉矶VS圣地亚哥 - SpeakingMax英语口语达人

This is the first time we have in Christianity someone attempting to say,"This is the authoritative list.

这是基督教里面第一次有人说,“这些是权威书目。

耶鲁公开课 - 新约课程节选

This is the first time the SPR has been tapped explicitly in response to high prices.

FORBES: Obama Taps Strategic Petroleum Reserve Without Good Reason

This is the first time in World Series history that such had happened twice.

FORBES: Game 6: Dare to Dream

This is the first time that the yuan has traded outside of China and Hong Kong.

FORBES: The Russian Bear And The Chinese Dragon