Conservationists are concerned the drop in productivity, as a result of a lack of sandeels, will mean fewer breeding birds and continued decline of key species.

海鳗数量的减少会导致海鸟生育能力下降，也就是说，繁殖鸟以及一些重要的鸟类数量会继续减少。 对此，自然保护主义者表示密切的关注。

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Pregnancy tests are conducted by ultrasound and, if found negative, sows return to the breeding area. The ability to pregnancy-test greatly increases farm productivity.

母猪是否怀孕可用超声波检测，如果发现未怀孕，就会返回原来饲养的地方，通过检测可以增加猪场的生产能力。

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Accordingly, we have shifted our breeding objectives from increasing productivity into improving palatability of rice varieties.

因此，人们已将育种目标从高产转向口感良好的水稻品种。

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