鲟鱼是硬骨鱼系中一类古老的类群，由于具有极高的营养价值而倍受人们的青睐，经济价值较高。
Acipenser is an old fish group in Osteichthyes because it finds favour in people 's eyes with high not only nutrition but economic value.
硬骨鱼系先前公认的硬骨鱼系的层级不是一个单源的群。它现在有专门的地位，包括像鱼一样的肉鳍次亚纲与条鳍次亚纲。
Osteichthyes the formerly recognized class Osteichthyes is not a monophyletic group. It now has the status of a vernacular to include the fish-like Sarcopterygii and the actinopterygians.
第二艘船上的一根绳子系在鲨鱼的尾巴上，但多次将鱼拖进水里的努力都失败了。
A rope from the second vessel was secured around the shark's tail, but repeated efforts to tow the fish into the water failed.
鸬鹚的颈部被绳子系住，他们只能吞食小鱼，更大和更易出售的鱼将无法吞下。
Strings tied around their necks mean they can only swallow the smallest-anything larger and more saleable get no further than their throats.
体长最多可达5英尺(1.5米)的狼鱼有着明显的齿系以适应由裹着硬壳的软体动物，蟹类以及海胆组成的食谱。
Reaching 5 feet (1.5 meters) long, wolffish have conspicuous dentition suited to a diet of hard-shelled mollusks, crabs, and sea urchins.
因68级瀑布的源头系地下泉，故四季恒温，珍贵的娃娃鱼就喜欢栖息生活在这种恒温的河流里。
Because the source of the 68-level Waterfall is underground springs, it keeps constant temperature all year round, while giant salamanders love to inhabit such homothermal rivers.
通过比较正常与发病的养殖水体以及肠道微生物区系可以预测鱼病的暴发以及筛选出有益菌株。
Through comparing the microflora of normal and sick turbot gut and living water, we hope to predict the outbreak of fish disease.
如果系小息我喺小食部食紧吞拿鱼手卷，一个风纪就会催我快啲啦！
If during the recess I am in the tuck shop eating tuna fish hand roll, one prefect will urge me Be quick!
如果系小息我喺小食部食紧吞拿鱼手卷，一个风纪就会催我快啲啦！
If during the recess I am in the tuck shop eating tuna fish hand roll, one prefect will urge me Be quick!
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