Dirt cheap
a. & adv. 非常便宜的[地], 毫无价值的[地]
📖 牛津释义
dirt cheap
(infml 口) very cheap(ly) 非常便宜（的）.
🧩 词语组成解析
dirt
[də:t]
n. 泥土;污垢，污泥;下流想法;恶意中伤的话;
cheap
[tʃip]
adj. 便宜的，廉价的;劣质的，低劣的;小气的，可鄙的;
adv. 便宜地;卑鄙地;
🗣️ 情景例句
during the week--
在本 内
That's really something.
真了不起。
It was from the study of these that so much was learnt about the interior of the earth.
正是从这两种波的研究中，我们可以了解到地球内部的许多情况。