Whereas the bone embraced many microscopic canals,allowing the passage of nerve fibers and blood vessels.
问题描述：
Whereas the bone embraced many microscopic canals,allowing the passage of nerve fibers and blood vessels.
如果错,错在哪?该如何改正?
The bone embraces many microscopic canals,allowing the passage of nerve fibers and blood vessels.
是正确的，那么请问
Whereas the bone embraced many microscopic canals,allowing the passage of nerve fibers and blood vessels.
如果错，错在哪？该如何改正？
答
The bone embraces many microscopic canals,allowing the passage of nerve fibers and blood vessels.是正确的,allowing是起补充说明作用的成分.
加上whereas就不对了,因为上面的句子本来是完整的,加上whereas之后就变成了从句,但后面又没有主句,句子就变得不完整了.
如果要修改,可以将allowing改成it allows,这样后面部分就不是补充说明的ing成分,而是变成了从句.但这只是语法上正确而已,意思恰当与否还另当别论.