我需要通过<use>个标签从sprite导入svg，所以svg和use的大小相同(use与父svg标签一样大).
<svg>
<use xlink:href="#facebook-hover"></use>
</svg>
我不知道到底是什么导致了这种尺寸差异，我该如何解决它.
这是我的演示，面向那些想帮助我的人:
svg {
width: 200px;
height: 200px;
position: relative;
}
use {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}<svg width="0" height="0" class="hidden">
<symbol version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 44 44" id="facebook-hover">
<title>ThirdParty/Facebook/2xpng1. Liquorice</title>
<defs>
<polygon id="path-1" points="0.001 0 40 0 40 40 0.001 40"></polygon>
</defs>
<g id="ThirdParty/Facebook/1.-Liquorice" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
<g id="Group-3" transform="translate(2.000000, 2.000000)">
<g id="Clip-2"></g>
<path d="M37.793,0 L2.207,0 C0.989,0 0.001,0.988 0.001,2.208 L0.001,37.792 C0.001,39.012 0.989,40 2.207,40 L21.379,40 L21.379,24.532 L16.173,24.532 L16.173,18.476 L21.379,18.476 L21.379,14.022 C21.379,8.856 24.539,6.042 29.145,6.042 C30.697,6.038 32.249,6.118 33.793,6.276 L33.793,11.676 L30.621,11.676 C28.111,11.676 27.621,12.862 27.621,14.614 L27.621,18.468 L33.621,18.468 L32.841,24.524 L27.585,24.524 L27.585,40 L37.793,40 C39.011,40 40.001,39.012 40.001,37.792 L40.001,2.208 C40.001,0.988 39.011,0 37.793,0" id="Fill-1" fill="#002E88" mask="url(#mask-2)"></path>
</g>
</g>
</symbol>
</svg>
<svg>
<use xlink:href="#facebook-hover"></use>
</svg>