For example the plant such as the clove of bad news oxygen, cordate telosma, if put in the head of a bed, or what cultivate indoors is overmuch, can cause anoxic symptom.

• 例如耗氧的丁香、夜来香等植物，假如摆放在床头，或在室内种植的过多，就会引起缺氧的症状。