求翻译：作战时不仅可以手持，还能将底部尖角插在地上，用棍支起。而这种样式在去掉底部尖角后，就成了宋代的步兵旁牌。盾牌介绍到宋代，就缺乏了往下的趣味，剩下的发展无非是略微改变形状，已经没有了进步的意味。是什么意思？

Combat not only handheld, but also to the bottom corners into the ground, with support from the stick. And this style of sharp corners in the bottom removed, you become a Song of infantry next card. Shield introduced to the Song Dynasty, on the lack of a top-down fun, the rest of the development is

When fighting hand-held, not only can also be sharp point at the bottom with a stick stuck in the ground support. And this kind of style in removing sharp point at the bottom of the Song dynasty, it was a post-infantry on licensing. shields introduced to the Song Dynasty, there is a lack of taste, a

When combat not only may grasp, but also can insert in ground the base acute angle, supports with the stick.But this kind of style after removes the base acute angle, has become nearby Song Dynasty's infantry the sign.The shield introduced Song Dynasty, lacked the downward interest, is left over the

Operations not only can be hand-held, sharp corners on the bottom can also be plugged in to the ground, with a stick up. The style is removed after a sharp corner at the bottom, next to the infantry in the song became a brand. Shield referred to the Song dynasty, lack of interest down, the rest of t

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