If the Cherry Blossom fall down by five centimeters per second,then how long it takes for two heart to get closed? 这是我自己翻译的。以下是度娘的:
If the whereabouts of the second speed is the speed of five cm, two heart how long it takes to get close?"
If the cherry falling speed is the second speed of five centimeters , then How long does it take to close to the hearts ?