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- Although natural hosts are birds, the avian influenza viruses are known to cross species barriers to infect other mammals, including humans. 盡管鳥(niǎo)類(lèi)是自然宿主，但禽流感病毒能夠跨物種感染其它哺乳動(dòng)物包括人類(lèi)。
- With plants we have conclusive evidence that the sterility of crossed species must be due to some principle. 在植物方面，我們已有確實(shí)的證據，表明雜交物種的不育性一定是由于某種原理而起。
- It is rash to cross the street without looking both ways. 不朝兩邊看看就穿馬路是莽撞的。
- Cross and angry words in family grate upon the ear. 不高興與生氣的話(huà)在一個(gè)家庭里令人不愉快。
- A mule is a cross between a horse and an ass. 騾是馬和驢交配而生的雜種。
- The Red Cross dealt out food to hungry soldiers. 紅十字會(huì )把食物分發(fā)給饑餓的士兵。
- Do wolves belong to the canine species? 狼是犬科動(dòng)物嗎？
- This cross marks the spot where she died. 這個(gè)十字符號標明她死去的地點(diǎn)。
- He made expiation for our sins on the cross. 他在十字架上為我們贖了罪。
- We should do our best to save endangered species. 我們應該竭盡全力挽救瀕于滅絕的生物。
- Mind out for the traffic when you cross the road. 過(guò)馬路要注意來(lái)往車(chē)輛。
- This rare bird has become an endangered species. 這種珍禽已成為瀕臨滅絕的物種。
- Passengers mustn't cross the rails. 乘客不得橫過(guò)鐵路。
- He was wearing a strange species of hat. 他戴著(zhù)一種奇怪的帽子。
- You had better cross out the last name. 你最好把最后一個(gè)名字劃掉。
- Don't be cross with the child for being late. 不要對遲到的孩子發(fā)脾氣。
- On maps, a cross is the symbol for a church. 在地圖上，十字符號代表教堂。
- Cross your heart; do you really? 你發(fā)誓，你是真的嗎？
- There are many species of chrysanthemum. 菊花品種很多。
- I hope I never cross her path again. 但愿我永遠不再遇見(jiàn)她。
