这一点很重要，因为理论表明，当目标鱼种的生物量为其原始水平的50%左右时，渔场才能达到可收获的最大可持续产量。
That matters because theory suggests that the maximum sustainable yield that can be cropped from a fishery comes when the biomass of a target species is about 50% of its original levels.
将镜头对焦至无限远，对准英仙座或其邻近星座，把光圈调至最大，曝光5分钟，应有收获。
Camera lens should be set to infinity with maximum aperture. then point the camera to perseus or neighbour constellations for a5-minute exposure time and try your luck.
地球上最高的山峰是珠穆朗玛峰。所有登山运动员都把爬上其峰顶视作是人生的最大收获。
The highest mountain on earth is Mt. Qomolangma. All mountaineers consider it as the greatest prize in life to reach its peak.
应用推荐