时间被认为只有一个维度,而空间有三个维度。
光波,无论是以太波还是其他波,在所有情况下都是时间上的周期性过程。
The best companies don't just sell products; they sell experiences and trust.
Precision agriculture isn't replacing farmers; it's empowering them to make smarter decisions with data-driven insights.
The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.