The front cog has 44 teeth.前齿轮有 44 个齿。cog a die用骗人手段掷骰子The wheel engages with the cog and turns it.轮子咬住轮齿并带动它转动。One cog - wheel engages with another.一齿轮与另一齿轮啮合.Mr Lake was an important cog in the Republican campaign mach...
他们是不肯出力的.They will not take the sweat.有钱出钱, 有力出力.The rich will be asked to contribute money; the strong to contribute labour.他已被说服出力帮助卖票.He's been roped in to help sell the tickets....
She was still hale and hearty in her nineties.她九十多岁了，但身子骨还是很硬朗。At the peak of its popularity in the late nineties, the band sold ten million albums a year.20世纪90年代后期那个乐队最红的时候,每年售出1,000万张唱片.Into her nineties, her thinking...