我努力学习，但似乎白白的。
wǒ nǔlì xuéxí ， dàn sìhū báibái de 。
I studied hard, but it seems it was in vain.
她尝试了很多方法，但最后都是白白的努力。
tā chángshì le hěnduō fāngfǎ ， dàn zuìhòu dūshì báibái de nǔlì 。
She tried many methods, but in the end, all her efforts were in vain.
做这些事情只会白白浪费时间。
zuò zhèixiē shìqíng zhī huì báibái làngfèi shíjiān 。
Doing these things will only waste time in vain.