snorkelling

v.

使用水下呼吸管潜游( snorkel的现在分词 )；

Snorkelling device
Snorkelling deaths in Australia, 1987-1996
Snorkelling-related deaths in Australia, 1994-2006.
Snorkelling and scuba diving deaths in New Zealand, 1980-2000
Ecotourism Snorkelling Routes at Marinha Beach (Algarve)
Snorkelling as a method for assessing spawning stock of Atlantic salmon, Salmo salar
Snorkelling and trampling in shallow-water fringing reefs: risk assessment and proposed management strategy
Filming and snorkelling as visual techniques to survey fauna in difficult to access tropical rainforest streams
Partial versus complete submergence: snorkelling aids root aeration in Rumex palustris but not in R. acetosa
Application of zoning and "limits of acceptable change"to manage snorkelling tourism.