1.High-tech drones are flying to the defence of tortoises in California's Mojave Desert.
defence防御;防衛(wèi)
The land was flat, giving no scope for defence.
這一地區(qū)非常平坦,根本沒法進(jìn)行防御 。
2.Ms Fedrick noted that if nothing was done to help the tortoises, they would be completely wiped out.
wipe out 使滅絕
The spill could wipe out the Gulf's turtle population.
這次原油泄漏可能會使波斯灣的海龜滅絕 。