Pre-Cambrian
美 英
例句
RD: I know you're working on a programme about Cambrian and pre-Cambrian fossils, David.
理查德·道金斯:大衛(wèi),我知道你正在做一個關(guān)于寒武紀(jì)和前寒武紀(jì)化石的專題節(jié)目。