Iva
Ideal Voltage Amplifier理想电压放大器；Inspection Visual Aid 检查用观察用具；Intra-Vehicular Activity （航天飞机）舱内活动
🗣️ 情景例句
Is this harmful to kids?
这对孩子有害吗？
The whole class is in a heated discussion.
全班同学正在热烈讨论。
He has never borrowed money from me.
他从未向我借过钱。