Obviation
n. 除去, 避免
??? 情景例句
He had an emergency.
他有緊急事情。
No. You should have taken the Yellow Line bus. You can get one at the next stop.
不是。你該乘黃線車才是。到下一站你可以搭上。
and mechanical systems like a wound watch, or the sun,
像上緊發條的手表那樣的機械裝置，或太陽，