Standard sera
[医] 标准血清
🧩 词语组成解析
standard
['stændɚd]
n. 标准，规格;旗，军旗;度量衡标准;直立支柱;
adj. 标准的，合格的;普遍的，一般的;公认为优秀的;
浆液, 血清\\n[医] 血清; 浆液
🗣️ 情景例句
Keeping busy. Yourself?
一直很忙，你呢？
I hadn't planned on swimming across the whole lake.
我可从没计划要游过整个湖。
They had to edge their way along this, sometimes wading across shallow streams, or swimming across deep pools.
他们不得不侧着身子往前走，有时过浅溪，有时游过深潭。