Leakagemeter
检漏仪
🗣️ 情景例句
Harvey Carlson.
这是Harvey Carlson。
He has lived here for a year.
他在这里住了一年了。[表示持续到现在的行为]
and mechanical systems like a wound watch, or the sun,
像上紧发条的手表那样的机械装置，或太阳，