Population parameter
[计] 总体参数
🧩 词语组成解析
🗣️ 情景例句
What are your greatest achievement?
你最大的成就是什么？
He keeps on studying ecology.
他不断攻读生态学。
After switching on powerful arc lights, they saw great stalagmites -- some of them over forty feet high -- rising up like tree-trunks to meet the stalactites suspended from the roof.
他们打开强力弧光灯，看见一株株巨大的石笋，有的高达40英尺，像树干似地向上长着，与洞顶悬挂下来的钟乳石相接。