WHO recommends a systematic approach to vector control-based on evidence and knowledge of the local situation.
世卫组织建议，以证据和对地方情况的了解为依据，系统地实施媒介控制。
2
Its control center is based in the forebrain, and it regulates breathing for use in speech, singing, sighing, and so on.
它的控制中心在前脑，而且它管理说话、唱歌、叹气等行为下的呼吸活动。
3
New laws were passed immediately that achieved the same result of resting soil and providing flood-control measures, but which were based on the principle of soil conservation.