🧩 词语组成解析
defensive
[di'fensiv]
adj. 防御用的，防守的;辩护的;自卫的;
n. 守势;辩护;
n. 吃, 食物\\na. 侵蚀的, 腐蚀性的
🗣️ 情景例句
What is your nationality?
你的国籍是什么？
When you visit an American home.
在你访问一户美国人家时
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。