Heptavalent
a. 七价的
🗣️ 情景例句
Then, in college, I became good at it.
然后， 在大学， 我变得很精于数学。
The lone sheep is in danger of the wolf.
孤独的羊难免遭狼的危险。
It seems that the further cats fall, the less they are likely to injure themselves.
看起来，猫跌落的距离越长，它们就越不会伤害自己。