Comsol
银铅焊料, 银锡软焊料（熔点296°C）
🗣️ 情景例句
He was a dull man and you had to explain things very slowly to him.
他脑筋迟钝，你必须慢慢地给他解释事情。
A creaking door hangs long on its hinges.
户枢不蠹。
Goodbye, Helen.Nice to see you.
再见，海伦。见到你真高兴。