s形的造句

• The s - shape songhua river which runs through the city proper is not frozen in winter , drawing crowds of fishing - lovers trying their luck and flocks of birds playing with the icy water
• The demand of high - tech consumer products is derivative , co - progressive and ratcheting . high - tech consumer products have s - shape life circle . there are barriers of time synchronization , widely association , widely alternative and consumers " habit in the market

• s形的的英语：ogee