Arenolite
人造礦石
??? 情景例句
Are they open?
店開著嗎？
A dog will not howl if you beat him with a bone.
骨頭打狗狗不叫。
below 20 per cent, its bactericidal action is negligible.
濃度低于20％時，殺菌能力基本上就不存在了。