figure out的用法及意思

vt。算出,想出,解决,理解如：can't figure out why he quit his job。我琢磨不透他为什么要辞掉工作。The boy can't figure out the algebra problems。这个男孩做不出这道代数题。I can't figure out why he is absent。我弄不明白他为什么缺席。