Rett
[医][=radionuclide esophageal transit time]放射性核素食管通过时间
🗣️ 情景例句
and a new paint job in the schoolrooms.
和重新油漆教室。
He who stands alone has no power.
孤掌难鸣。
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，