Dive and snorkel sites are easily accessible by boat from the beach.从海滩坐船就可以直接到达潜水和潜泳的场所,方便极了....clamping the mouthpiece of my snorkel tightly between my teeth.我紧咬水下呼吸管的接口This is full stroke swimming with a front - mount...
This is full stroke swimming with a front - mount snorkel.这是戴呼吸管的完整划臂动作.Dive and snorkel sites are easily accessible by boat from the beach.从海滩坐船就可以直接到达潜水和潜泳的场所,方便极了....
A combination of operator mismanagement and design flaws caused the accident.事故归因于操作人员处置失当,也归因于设计方面的漏洞.Mismanagement and climate change are shrinking clean water supplies worldwide.管理不善(mismanagement)和气候变化正在逐步削弱全球干净水资源的供...
Objective To investigate the correlation of serum PRL, FSH, LH 2 with female sterility and menoschesis.目的探讨血清催乳激素(PRL) 、 卵泡刺激素(FSH) 和黄体生成素(LH2)与育龄妇女不孕症及闭经之间的关系....