Then we have " ree" , an r sound and a high e.

然后是“ree”，一个/r/和一个/e/。

What happens to your REE — this is this middle line here, that's the resting energy expenditure.

REE 水平会如何变化呢——就是这条中间的线，就是静息能量消耗。

So don't make that REE. Refer, refer, but re re re refer, refer.

所以不个REE。参考，参考，但重新参考，参考。

And if this is too hard, just try to make the " ree" sound without the ending.

如果这太难了， 就试着发出没有结尾的“ree” 声。

So this is saying: " dee" and " ree" ; the " d" sound and the " r" sound.

所以这是说：“dee” 和“ree” ； “d” 和“r” 。