bacteria bed

常见例句

• The brook warbled over its rocky bed.
  小溪潺潺流过多石的河床。
• A film of mucus and bacteria on a tooth surface.
  齿菌斑牙齿表面一层粘液和细菌的膜
• She rushed off to work leaving her bed unmade.
  她匆忙去上班连床都没铺好。
• Bacteria are too small to see with the naked eye.
  细菌太小，肉眼看不见。
• A mosquito netting completely surrounds our bed.
  一顶蚊帐把我们的床完全围住了。
• Many diseases are caused by bacteria.
  许多疾病是由细菌引起的。
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