プログレッシブ和英中辞典(第4版)の解説
このさい【×此の際】
〔この場合〕now, on this occasion；〔この事情で〕under these circumstances
この際きっぱり断らなければだめだ
You must give a flat refusal right now.
この際ご報告申しあげたいのはこのことです
Let me take this opportunity to tell you this.
この際だから大目に見ておこう
「The circumstances being what they are [The situation being what it is], we'll overlook it.
この際それが最良の道かもしれない
That may be the best we can do at this stage [point/juncture].