Remove diseased, dying or dead wood, then any stems that cut across each other: this improves air flow and lessens disease.
修剪去病枝、枯死的木质部,然后是互交的枝:目的是为了改善通风,减少疾病。
No amount of cleaning will remove the severe staining left by tetracycline or systemic disease because these pigments lie inside the tooth; you'll have to take more aggressive measures against these.
不过洗牙次数再多也不能去除由于四环素或系统性疾病导致的牙齿深度着色,因为这些色素已进入你的牙齿内部,你需要采取更加积极地措施来对付它们。
Under the bilateral trade agreement, U.S. exporters must remove spinal columns, brain tissue and other parts considered linked to the mad cow disease.
在双方达成的协议下,美国出口商必须去除有可能导致疯牛病的牛脊肉、脑组织以及其它部分。
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