Children swim at the pool, under the watchful eye of lifeguards.孩子们在救生员的监护下在水池里游泳。The lifeguards must be trained to deal with any sort of emergency.救生员一定要接受训练,学会应付各种紧急情况.Most of the cases occur at beaches without lifegua...
The troops were landed at a beachhead.部队被送到滩头堡登陆.They were attacked unexpectedly from both sides as soon as they landed at a beachhead.他们一登上滩头阵地就意外地遭到两面夹攻.Commander Tazewell Shepard , the naval aide , gave a report , pre...