It is better to not wear your heart on your sleeve.

最好不要轻易地流露感情。

But you also tend to wear your heart on your sleeve.

可你也是个容易激动(情绪化)的人。

Enjoy this day, and let yourself wear your heart on your sleeve.

享受这一天，让你的情感充分外露吧！

Be careful when you talk to her. Never wear your heart on your sleeve.

跟她说话时一定要小心，千万不要什么都说真话。

To wear your heart on your sleeve now means that it is easy for other people to know how you are feeling.

现在就把你的心写在你的衣袖上，这意味着别人很容易知道你当前的感受。