As is shown in the pictures, (From the pictures, we can see clear that) with the increase of commercial fishing, the number of fishes dramatically decreased. In one picture, there were various kinds of fish and only one fishing-boat in 1900. On the contrary, in 1995 there was only one fish, with many fishing-boats.
The purpose of this picture is to show us that due attention has to be paid to the decline of ocean resources. Owing to overfishing the number of fishes has obviously dropped. If we let this situation go/continue as it is, we do not know where fish will be in the future. By that time, our environment will suffer a great destruction.
Therefore, it is imperative for us to take drastic measures. For one thing, we should appeal to our authorities to make strict laws to control commercial fishing. For another, we should enhance the awareness of people that the ocean resources are very vital to us. Only in this way can we protect our ocean resources. Also I believe that we humans can overcome this difficulty, and we will have a brighter future
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