lukewarm

茶已经放了一会儿，现在只是温的。

The tea has been sitting for a while and is now only ___lukewarm.

这杯茶不冷不热，刚好可以喝。

The tea is ___lukewarm, perfect for drinking now.

他对这个新项目反应冷淡，似乎没什么兴趣。

He showed only a ___lukewarm response to the new project.