牙斑如果不清除就會導(dǎo)致牙齒蛀蝕和牙齦疾病。When not removed, plaque causes tooth decay and gum disease.他們從上層文職部門清除了上千名公務(wù)員。They have purged thousands from the upper levels of the civil service.無法把所有的沙礫都清除干凈。You'll never quite get rid of e...
那些也許是野驢或斑馬在成群地奔跑.Those were wild asses maybe, or zebras flying around in herds.藏野驢與家畜之間是否存在牧草競爭?Is there really competition for forage between kiang and livestock?野驢》茫茫的荒漠,是野驢的自由世界.The ass For ass, the vast Gobi is a hea...