Premiotic phase
[医] 减数前期
🧩 词语组成解析
[医] 减数分裂前的
🗣️ 情景例句
Hi.
嗨。
Nothing venture, nothing have.
不入虎穴，焉得虎子。
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。