And when diving , marine mammals ' blood travels only to the parts of the body that need oxygen , such as the heart , the brain and the swimming muscles 当潜入水中时，海洋哺乳动物的血液仅流经身体需要氧气的部位，如心、脑和游泳用的肌肉。
He unclosed his eyes and saw again the water below him . " if i could free my hands , " he thought , " i might throw off the noose and spring into the stream 他睁开眼睛，重又望着脚下的河水，心想， “要是我能松开双手，就可以挣开绞索跳进河里，潜入水中，避开子弹，使劲游到岸上，跑进树林然后逃回家。
" signals from the transmitter indicated that the green turtle usually dived for 15 to 30 minutes to eat sea grass and sea weed and surfaced up to breathe before the next dive 卫星传讯器发出的讯号显示，该绿海龟通常会潜到水底约十五至三十分钟，进食海草及海藻，接会浮上水面呼吸，然后再次潜入水中。
Compact structure , small volume , low noise , outstanding energy conservation , easy to check and maintain , no need of pump room , gotten into working while being submerged into water , and great reduction of construction cost 整体结构紧凑、体积小、噪声小、节能效果显著，检修方便，无需建泵房，潜入水中即可工作，大大减少工程造价。
He crept down the bank , watching with all his eyes , slipped into the water , swam three or four strokes and climbed into the skiff that did " yawl " duty at the boat s stern . he laid himself down under the thwarts and waited , panting 他悄悄溜下河堤，睁大眼睛四处张望，然后潜入水中，游了三四下，就爬到船尾那只“突突”待命的小艇上了，躺在坐板下面，气喘吁吁地等着开船。
We have a book that shows us the hiking trails in the mountains of hawaii and without this book we would never find the trails . once we found the trails , we would have no idea what we were doing and where we were going without our hiking guidebook 经过两三四个小时的路程，我们必然会到达目的地，于是我们就来到这地方，有美丽的瀑布小小的池塘，我们潜入水中，把一切疲累洗去
Echosounder is fired on underwater intelligent explored robot and come into watcr . realtane feedback information of height gives main computer on the bank . main computer leads the robot on based of information of height and avoids robot to get in water bottom 本论文的研究目的是为了保障水下智能探测机器人在水下的安全正常运行，将测高声纳安装在机器人载体上，随着机器人载体潜入水中，实时反馈高度信息给岸上主机，主机可以根据高度信息引导机器人的操作，可以有效的防止机器人陷入水底。
