They painted the underside of their planes with a black varnish.

他们在飞机的底涂上了一层黑漆。

These songs underside,all that my favourite,which were selected from my computer 。slow but not pausal,classical but not popular. closing your eye and feel like just a music tour.

下面是我从我的电脑面精选的几首，舒缓而不停滞，经典但不流行。