Constantan
n. 康铜(铜镍合金)\\n[医] 康铜(镍铜合金)
🗣️ 情景例句
I haven't seen you for a long time.
很久没见了。
Nothing is so certain as the unexpected.
天有不测风云，人有旦夕祸福。
Hello! Are you Li Ming?
你好！你是李明吗？