Primary dental laminae
[医] 原始牙板
🧩 词语组成解析
primary
['praɪmɛri]
adj. 首要的，主要的;最早的，原始的;[地质学]原生的;基本的;
n. 第一位;最好者;要素;候选人提拔会;
prim第一，主要的+ary形容词后缀 → 第一的，最开始的 → 最初的；根本的
dental
['dentl]
adj. 牙齿的;牙科的;（辅音）齿音的;
n. 齿音;
板, 薄层, 薄片, 层\\n[医] 板, 层, 叶片(植物)
🗣️ 情景例句
That'll be fifty-five dollars and twenty cents.
一共55元2角。
That important man is very unassuming in his manner.
那个要人彬彬有礼，是一位毫不摆架子的人。
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。