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...
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...