1. Left hereditary rings and modules over left hereditary rings are studied, some new characterizations of left hereditary rings are given by using vn-injective modules. 对左（右）遗传环及左（右）遗传环上的模进行讨论，给出遗传环的若干等价刻划和左（右）遗传环及左（右）遗传环上的模的一些性质。
2. Right palm over left, left over right. 正确的棕榈离开，左结束权利。
3. Right palm over left, left over right. 正确的棕榈离开，左结束权利。
4. Residual amounts of maneb zinc are lower than China , USA and the Japanese maximum are left over limiting the quantity, the maximum higher than European Union is left over limiting the quantity. 代森锰锌残留量低于中国、美国和日本的最大残留限量，高于欧盟的最大残留限量。
5. Residual amounts of maneb zinc are lower than China , USA and the Japanese maximum are left over limiting the quantity, the maximum higher than European Union is left over limiting the quantity. 代森锰锌残留量低于中国、美国和日本的最大残留限量，高于欧盟的最大残留限量。
网络释义
devolve on hand over handover make over remove set over 移交;
overflow extravasation flood overbrim run over slop over spill over spillage 溢出;
devolve on hand over handover make over remove set over 移交;
devolve on hand over handover make over remove set over 移交;
