Effectivity
n. 有效, 功效
🗣️ 情景例句
That's all right.
没关系。
You can't make omelets (or omeletts) without breaking eggs.
有失才有得。
After switching on powerful arc lights, they saw great stalagmites -- some of them over forty feet high -- rising up like tree-trunks to meet the stalactites suspended from the roof.
他们打开强力弧光灯，看见一株株巨大的石笋，有的高达40英尺，像树干似地向上长着，与洞顶悬挂下来的钟乳石相接。