var js = $('ul li:first-child'); js.after('<li><span>Pascal</span></li>'); js.after('<li><span>Lua</span></li>');
var py = $('ul li:nth-child(4)'); py.after('<li><span>Ruby</span></li>')
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吉岸齐昂
var js = $('ul li:first-child'); js.after('<li><span>Pascal</span></li>'); js.after('<li><span>Lua</span></li>');
var py = $('ul li:nth-child(4)'); py.after('<li><span>Ruby</span></li>')