Hydroseal
液封, 水封, 液压密封
🗣️ 情景例句
Dad, Richard--Alexandra's here.
爸爸 Richard Alexandra来了。
I'm going to have some x-rays taken.
我要拍摄Ｘ光照片。
About once a month. Not too often, because neither of us has much time. We both have too much work to do.
大约每月一次。不太经常写信，因为我俩的时间都很紧。我们都有做不完的事。