已知 yǐ zhī 🔊 known (to science) + Review this word Meanings yǐ zhī known (to science) Its characters 已yǐalreadyHSK 4知zhīto know In sentences Pinyin 埃博拉Āi bó lā是shì人类rén lèi已知yǐ zhī的de最zuì致命zhì mìng的de病毒bìng dú之一zhī yī。Ebola is one of the most virulent viruses known to man. #8563313