Piccovar
皮介瓦尔石油树脂
🗣️ 情景例句
He tried to smile.
他设法要微笑。
To consider the statistics
细看统计
it is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.
不仅能够确定鱼群的位置，而且可以根据鱼群回声的特点分辨出是鲱鱼、鳕鱼，这是人们所熟悉的其他鱼。