parse of a sentential form

a parse of a sentential form is the construction of a derivation and possibly a syntax tree for it.

句型的分析是某个推导（或许是其语法树）的构造过程。2.If a sentential form is ambiguous, then it has more than one syntax tree and therefore, in general, more than one handle.如果句型是二义性的，那末，它不只有一棵语法树，因此，一般地说，也不只有一个句柄。