hold on to[英][həuld ɔn tu:][美][hold ɑn tu]v.抓住;坚持;不放弃例句1.my father said that if we believe something was true, we should hold on to it.父亲说我们相信某事是,就应该坚持。2.mr smith told me to hold on to my oil shares.史...
food chain 英[fu:d tʃein] 美[fud tʃen] n. 食物链; [例句]the effect was to d**rupt the food chain, starving many animals and those that preyed on them其结果就是破坏食物使很多些以捕食它们为生的动物饿死。[其他] 复数:food c...