电子显微照揭示了鲨鱼皮的速度奥秘，“牙状鳞片称为皮肤的细齿，水通过密纹而没有翻滚”鲨鱼研究员乔治·伯吉斯说。
An electron micrograph reveals sharkskin's secret to speed: tooth-like scales called dermal denticles.
1520年葡萄牙人发现该群岛。1536年法国人把该群岛命名为圣皮埃尔和密克隆群岛。1604年法国渔民在此建立永久居民点。
The Portuguese discovered the islands in 1520. 1536 French people to the islands named Saint Pierre and Miquelon. 1604 French fishermen in the establishment of a permanent settlement.
摘要 ［摘要］口腔密螺旋体是健康牙周人群口腔细菌的成员之一。
Abstract : Abstract: Oral treponema is a member of oral bacteria in the healthy periodontal tissue.
但牙周袋菌群一旦失调，密螺旋体会大肆繁殖并成为牙周疾病的主要致病菌。
However, once flora imbalance occurs in the periodontal pocket, oral treponema will reproduce rapidly and becomes the main pathogenic bacteria of periodontal disease.
但牙周袋菌群一旦失调，密螺旋体会大肆繁殖并成为牙周疾病的主要致病菌。
However, once flora imbalance occurs in the periodontal pocket, oral treponema will reproduce rapidly and becomes the main pathogenic bacteria of periodontal disease.
应用推荐