Heedlessly
adv. 掉以轻心地；不加注意地
📖 牛津释义
heedlessly
adv.
🗣️ 情景例句
Nope.
不会。
Let every man praise the bridge he goes over.
饮水思源。
and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.
测出回声间隔的时间，便可算出该处海洋的深度。