Plants and trees need water to grow; ______, friendship needs our heart and passion to develop.
A:similarly
B:generally
C:naturally
D:fortunately
将函数y=sin(x﹣π3)的图象上所有点的横坐标伸长到原来的2倍(纵坐标不变),再将所得的图象向左平移π3个单位,得到的图象对应的解析式是( )