Tsukasa demands that Senku abandons science, but there’s no way he can do that. Tsukasa is left with no choice but to kill him.
seventeen millionths of a 
second slower every year.
.يتباطأ بسبعة عشر جزء من مليون الثانية كلّ سنة
está ficando dezessete mil-centésimos
de segundo a cada ano.