Optionality
n. 期权性风险
🗣️ 情景例句
And that way,
而且那样的话，
You have to study English, don't you?
你必须学英语，不是吗？
The editor at once sent the journalist a fax instructing him find out the exact number of steps and the height of the wall.
”编辑立即给那位记者发去传真，要求他核实一下台阶的确切数字和围墙的高度。