<math xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="{\displaystyle {\mathsf {L}}}">
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            <mi mathvariant="sans-serif">L</mi>
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    <annotation encoding="application/x-tex">{\displaystyle {\mathsf {L}}}</annotation>
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['<math xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="{\\displaystyle {\\mathsf {L}}}">\n  <semantics>\n    <mrow class="MJX-TeXAtom-ORD">\n      <mstyle displaystyle="true" scriptlevel="0">\n        <mrow class="MJX-TeXAtom-ORD">\n          <mrow class="MJX-TeXAtom-ORD">\n            <mi mathvariant="sans-serif">L</mi>\n          </mrow>\n        </mrow>\n      </mstyle>\n    </mrow>\n    <annotation encoding="application/x-tex">{\\displaystyle {\\mathsf {L}}}</annotation>\n  </semantics>\n</math>', '<math xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="{\\displaystyle L}">\n  <semantics>\n    <mrow class="MJX-TeXAtom-ORD">\n      <mstyle displaystyle="true" scriptlevel="0">\n        <mi>L</mi>\n      </mstyle>\n    </mrow>\n    <annotation encoding="application/x-tex">{\\displaystyle L}</annotation>\n  </semantics>\n</math>', 'diffusion length', 'ISO 80000-10:2019 Quantities and units — Part 10: Atomic and nuclear physics']