境界 きょうかい要素 ようそ ほうじゃなかったです
kyōkaiyō sohōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 境界要素法

1. Boundary element method wasn't.; It wasn't the boundary element method.

Past/Perfective
Negative
Polite
Casual Register