知识1

<span style="TEXT-ALIGN: justify; WIDOWS: 2; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; DISPLAY: inline="inline"  !important; FONT: 14px="14px" /24px arial, 宋体, sans-serif; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">正手发左侧上（下）旋球</span><br style="TEXT-ALIGN: justify; WIDOWS: 2; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; FONT: 14px="14px" /24px arial, 宋体, sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"/><span style="TEXT-ALIGN: justify; WIDOWS: 2; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; DISPLAY: inline="inline"  !important; FONT: 14px="14px" /24px arial, 宋体, sans-serif; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">　　1、 特点：左侧上（下）旋转力较强，对方挡球时向其右侧上（下）方反弹，一般站在中线偏左或侧身发球。</span><br style="TEXT-ALIGN: justify; WIDOWS: 2; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; FONT: 14px="14px" /24px arial, 宋体, sans-serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"/><span style="TEXT-ALIGN: justify; WIDOWS: 2; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; DISPLAY: inline="inline"  !important; FONT: 14px="14px" /24px arial, 宋体, sans-serif; WHITE-SPACE: normal; ORPHANS: 2; FLOAT: none; LETTER-SPACING: normal; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">　　2、 要点：①发球时要收腹，击球点不可远离身体；②尽量加大由右向左挥动的幅度和弧线，以增强侧旋强度。③发左侧上旋时，击球瞬间手腕快速内收，球拍从球的正中向左上方摩擦。④发左侧下旋时，拍面稍后仰，球拍从球的中下部向左下方摩擦。</span>