检验表明水生有壳动物的毒素水平提高了。Tests showed increased levels of toxin in shellfish.游客们可以看到一系列各种各样、色彩斑斓的水生动植物。Visitors can view a rich and colorful array of aquatic plants and animals.池塘虽小，但能为许多水生植物和鱼类提供足够的养分。The pond is quite small ...
Robb is torn between becoming a doctor and a career in athletics.罗布在做医生还是当运动员之间痛苦抉择，左右为难。Prosecutors may try to determine if Robb gave false testimony when he appeared before the grand jury.检方可能要努力查证罗布在大陪审团面前是否作了伪证。Robb ...
Haley, with visible reluctance, handed over the fifty dollars to Tom.海利很不乐意地交给汤姆五十块钱.She gave Tom a teaspoonful and watched with the deepest anxiety for the result.她给汤姆服了一汤匙药,然后万分焦虑地等着结果.Tom wasted no time in telling me ...