cop a tube的用法和樣例：
例句
用作及物動(dòng)詞 (vt.)
- The milk is believed to be squirted into the calf's mouth via a tube formed by the calf's tongue and the mother's nipple.
我們認為乳汁是透過(guò)海豚寶寶的舌頭與母親乳頭所形成的管狀縫隙射入寶寶口中。 - The model hypothesizes, for example, that a simple tubular feather preceded the evolution of barbs because barbs are created by the differentiation of the tube into barb ridges.
比如，我們的模型假設，簡(jiǎn)單的管狀羽毛先于羽枝的演化，因為羽枝是由管子分化出羽枝脊才產(chǎn)生的。
