例句與造句

1. new materials of trace fossils from the early triassic daye formation in huaxi region of guiyang
   貴陽花溪地區(qū)下三疊統(tǒng)大冶組遺跡化石的新材料
2. this hexagonal trace fossil paleodictyon nodosum dated tens of millions of years ago may be created by a creature that is still alive in the deep atlantic ocean
   這些有數(shù)千萬年的六角形痕跡化石，可能由一種現(xiàn)今仍然生存在大西洋海底的生物造成。
3. of which 4 new genera and 4 new species are established . discovery of a lot of fossil worms with their traces provide direct clues to study on the locomotion style of the worm and indirect evidences for trace fossils to find their producer
   在以上屬種中發(fā)現(xiàn)大量的蟲、跡同在的化石，為研究早寒武世的翻吻動物的運動方式以及遺跡化石提供了直接依據(jù)。
4. It's difficult to find trace fossils in a sentence. 用trace fossils造句挺難的