The backward connection should begin in a decision and lead back to a merge.
逆向连接应从decision开始并引回merge。
2
The advanced culture would lead to developed economy and backward culture would result in poverty.
先进的文化造就发达的经济，落后的文化只能伴随着贫困的经济。
3
The forward compatibility backward compatibility tin whisker voids micro-voids and surface finishes were emphasized and how to avoid the lead free transfer problems were reviewed.