❶What was all that work for? (あの努力は何だったんだろう?)
❷All that work was for nothing. (あの努力は全部無駄だった)。
I spent an hour blowing out my hair
(私は1時間かけてヘアセットした)、
and as soon as I stepped out, (外出た途端)
due to the humidity and sweat, (湿気と汗のせいで)
my hair got all messy.(髪がボサボサになった)。
What was all that work for? (あの努力はなんだったんだろ?)
と言えます。参考までに!