电阻的测量单位是欧姆。The electric resistance is measured in ohm.网路电阻超过230欧姆时，读数就完全不准了。When resistance in the circuit exceeds 230 ohms, the reading is not completely dependable.我们取发射极基极电阻的典型值为250欧姆左右.We shall take the typical emitt...
最初的草裙舞是一种礼拜仪式.When hula began it was a form of worship.除了吃的外, 还有夏威夷式宴会的特色表演——草裙舞.Besides the food, hula dancing makes a luau special.这就是刚才跳草裙舞的姑娘.That's the girl who hula - hulaed just now....