You can trim the edges of the plastic if it's a little too big.

如果它有点太大，你可以修剪塑料的边缘。

With his ax he trimmed away the edge of bark and cut the wood straight, so that each log fitted against the next, with hardly a crack between them.

他用斧头削掉树皮的边缘， 把木头砍得很直，这样每根原木都紧贴着下一根， 它们之间几乎没有缝隙。