Translation of "Threshold" in Japanese

Tom carried Mary across the threshold.

トムはメアリーを抱いて敷居をまたいだ。

In a few seconds I would have overcome the desperation threshold.

後数秒で私は絶望の分岐点を越えるのだ。

Tom picked Mary up the same way a man carries his new bride across the threshold and gave her a kiss on the cheek.

トムはメアリーをお姫様抱っこしてほっぺにキスをした。