Might is a modal verb and its place on the level of possibility scale is somewhere in the middle between definite and impossible.
“可能”是一个情态动词，其可能性大小处于确定和不可能之间。
2
For large scale free structure with very great weight, such as a large and heavy-duty launch-vehicle, the free-free modal test is realized difficultly.
The modal identification and excitative selectiion for large scale construction machinery are analyzed in this paper, and the proposed method has been used in enginnering practice.