我已经跟不上
I can't keep up.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
我开始快跑时我已经跟不上比尔了。
I couldn't keep up with Bill when I started to run fast.
youdao
我已经跟不上技术的变化了。
I can't keep up with all the changes in technology.
但他们抱怨说，我已经跟不上时代的步伐了。
But they grumble that I'm out of step with The Times.
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