来自刘品宽的问题
下面的句子成分实在搞不懂thiscontinentalslopeusuallystartsataplacesomewherenearthe100-fathommarkandinthecourseofafewhundredmilesreachesthetrueoceanfloorat2500-3500fathoms.
下面的句子成分实在搞不懂
thiscontinentalslopeusuallystartsataplacesomewherenearthe100-fathommarkandinthecourseofafewhundredmilesreachesthetrueoceanfloorat2500-3500fathoms.

