Near the end of Devonian times, thirty percent of all animal life vanished.在泥盆纪末期，30％的动物物种都灭绝了。The contact relationship between Silurian and Devonian is parallel unconformity.泥盆系与志留系之间为平行不整合接触.Blooming of Bacteria and Al...
Deprived of the crushing victory it was confidently expecting, the party cried foul.失去了自以为十拿九稳的压倒性胜利，该政党声称对手违规。'Are you sure the raft is safe?' she asked anxiously. 'Couldn't be safer,' Max assur...
They wolf-whistled at me, and I was so embarrassed I tripped up.他们吹口哨挑逗我，我窘迫之下绊了一跤。She tripped and fell last night and broke her hip.她昨晚绊倒了，摔坏了髋骨。I tripped up and hurt my foot.我绊了一下，伤到了脚。...