Ulcerating
v. （使某物）形成溃疡( ulcerate的现在分词 ); （使）腐败
🗣️ 情景例句
I'll be back
我会回来
Tell us about your post-purchase servicing.
告诉我们有关你们售后服务的情况。
drawing the particle first towards the advancing wave,
先把微粒拉向前移的海浪，