根据沉积厚度划定大陆架外部界限的英文

delineation of the outer limits of the continental shelf based on sediment thickness

• 根据:    on the basis of; a ...
• 沉积:    deposit; sedimenta ...
• 厚度:    thickness; land
• 划定:    delimit; designate
• 大陆架:    continental shelf; ...
• 外部:    outside; external
• 界限:    demarcation line; ...