hints:

序號(hào)不用寫~

標(biāo)點(diǎn)符號(hào)不用寫~
is a fact of life hinge on
is a fact of life 是無可爭辯的事實(shí) hinge on依 ... 而定, 以 ... 為轉(zhuǎn)移 ——譯文來自: lina199