If I were a boy Even just for a day I’d roll out of bed in the morning And throw on what I wanted and go Drink beer with the guys And chase after girls I’d kick it with who I wanted And I’d never get confronted for it Because they’d stick up for me
If I were a boy I think I could understand How it feels to love a girl I swear I’d be a better man I’d listen to her Cause I know how it hurts When you lose the one you wanted Cause he’s taken you for granted And everything you had got destroyed
If I were a boy I would turn off my phone Tell everyone its broken So they think that I was sleeping alone I’d put myself first And make the rules as I go Cause I know that she’d be faithful Waiting for me to come home (to come home)
If I were a boy I think I could understand How it feels to love a girl I swear I’d be a better man I’d listen to her Cause I know how it hurts When you lose the one you wanted (wanted) Cause he’s taken you for granted (granted) And everything you had got destroyed
It’s a little too late for you to come back Say its just a mistake Think I forgive you like that If you thought I would wait for you You thought wrong
But you're just a boy You don’t understand (yea you don’t understand) How it feels to love a girl Someday you’ll wish you were a better man You don’t listen to her You don’t care how it hurts Until you lose the one you wanted Cause you've taken her for granted And everything you had got destroyed But you're just a boy…
一只普通的跳蚤的活动范围十分广大的, 我就当它是一平方公尺了 (1 m2), 跳蚤就当它能跳三尺了. 换句话说是活动空间是 1 m X 1 m X 3m = 3 m^2; 我就当试验师的瓶子的半径是两公分, pi * radius^2 * height : 3.142 X 0.02^2 X 3 = 3.7704 x 10 -0.3 m^2跳蚤的活动范围从3 m^2 变到3.7704 x 10 -0.3 m^2, 几乎缩小了百分百, 跳蚤依然能生存.
