Their methods do not attempt to estimate the actual biomass of fish species in particular parts of the ocean, but rather changes in that biomass over time.
他们的方法并不是要评估特定海域鱼种的实际生物量，而是评估在这一段时间内生物量的变化。
Their methods do not attempt to estimate the actual biomass(the amount of living biological matter) of fish species in particular parts of the ocean,but rather changes in that biomass over time.
他们的方法并不是要评估特定海域鱼种的实际生物量，而是评估在这一段时间内生物量的变化。
Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time.
他们的方法并不是要评估特定海域鱼种的实际生物量，而是评估在这一段时间内生物量的变化。
Their methods de not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time.
他们研究了半个世纪以来世界上所有的渔场，其研究方法并不是为了试图估算特定区域的海洋中实际生物总数（活着生物的总数），而是研究单位面积中海洋生物数量发生的变化。
However, in order to more secure use of biomass boilers, in the actual operation of the process we should pay attention to what?
不过，为了更安全的使用生物质锅炉，在实际操作过程中我们又该注意哪些呢？
However, in order to more secure use of biomass boilers, in the actual operation of the process we should pay attention to what?
不过，为了更安全的使用生物质锅炉，在实际操作过程中我们又该注意哪些呢？
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