Arthrostracous
关节壳的
🗣️ 情景例句
It might be simpler and less expensive .
这样可能比较简单而且省钱。
Medicines are not meant to live on.
不能靠药物度日子。
Fortunately, however, ancient men made tools of stone, especially flint,
然而， 幸运的是，远古人用石头制作了工具，特别是用燧石，