为了谁牺牲了我
[wéi le shéi xī shēng le wŏ]
Expresses a sacrifice has been made by oneself, maybe for another or certain causes which could represent deep friendship, love, or some important beliefs or principles one values deeply enough to make such sacrifices. It implies a question of selfless acts, showing loyalty and care or expressing the importance or worthiness of that which is sacrificed for.