Essential fever
[医] 特发性热
🧩 词语组成解析
fever
['fivɚ]
n. 发热，发烧;热病;一时的狂热;激动不安;
vt. 引起发热;使狂热;使患热病;
vi. 发热或变得发热;狂热;患热病;
🗣️ 情景例句
Bye-bye.
再见。
Swimming promotes health.
游泳有益健康。
and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.
我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。