The difficulty is to carve a hole in the bamboo, because the grain runs straight, so it's hard to cut it this way, but easy to cut in across the grain.

这个困难度在于要在竹子里挖洞，因为竹子纤维是直线的，所以这样锯不好，但是横著锯就简单了。

youdao

The difficulty is to carve a hole in the bamboo, because the grain runs straight, so it's hard to cut it this way, but easy to cut in across the grain.

这个困难度在于要在竹子里挖洞，因为竹子纤维是直线的，所以这样锯不好，但是横著锯就简单了。

youdao