Effortful
a. 显示努力的,充满努力的,需要努力的
✅ 同义词
🗣️ 情景例句
Is that a proposal, or are we just playing a game?
这是求婚呢 ，还是仅仅在玩游戏？
You really don't have anything to apologize for.
你真的没什么可道歉的。
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。