Could you tell me when you leave Nanjing?
Ok, I'll call you before I leave.
The verb after before is the previous action, so use the simple present tense to indicate the future, the clause uses the simple present tense to indicate the future, and the main clause uses the future tense! This follows the principle of "from now on"!
The summer climate is hot, human metabolism is accelerated, and the demand for nutrients is greatly increased. Women's health nee