Placer mining
淘金
🧩 词语组成解析
n. 砂矿, 砂矿开采地, 放置者, 得名次者
mining
['mainiŋ]
n. 采矿（业）;
v. 在…中开采，开采(mine的现在分词);在…中[下]布雷;以地雷[水雷]炸毁;
🗣️ 情景例句
I want to keep the after-school programs--
我要保存这些课外活动--
It is lost labour to sow where there is no soil.
没有土壤，播种也是徒劳。
What size?
什么尺码的？