Citrullinemia
瓜氨酸血
🗣️ 情景例句
Don't be lazy, the older you get, the harder it will be to learn.
别偷懒，年纪越大，学起来就越难。
My uncle had a heart attack last year.
我的叔叔去年患了心脏病。
Fierce wars between Native Americans and European settlers broke out.
美洲土著人和欧洲殖民者之间发生了激烈的战争。