Flankering
n. 【军事】；侧面堡垒, 侧堡
🗣️ 情景例句
He actually took me to meet his foreman.
事实上他带着我去见他的工头。
He keeps on studying ecology.
他不断攻读生态学。
easily obtainable from the lunar rocks in the form of liquid oxygen.
从月球上的岩石中很容易提炼出液态氧，