opening piece meaning in Chinese

闪开的棋子

I had crossed a marshy tract full of willows , bulrushes , and odd , outlandish , swampy trees ; and i had now come out upon the skirts of an open piece of undulating , sandy country , about a mile long , dotted with a few pines , and a great number of contorted trees , not unlike the oak in growth , but pale in the foliage , like willows
我穿过了一大片长满杨柳芦苇和许多古怪的我不认得的植物的沼泽地，现在我来到了一片约一英里长的起伏不平的沙地的边缘。这里点缀着少量的松树，还有大量的长得歪歪扭扭的树，样子略似橡树，叶色则淡如杨柳。
Those who understand such enclosures will think i had very little contrivance , when i pitch d upon a place very proper for all these , being a plain open piece of meadow - land , or savanna , as our people call it in the western collonies , which had two or three little drills of fresh water in it , and at one end was very woody
我孤身一人，要圈地修筑篱笆无疑是一项巨大的工程，可这样做又是绝对必要的。所以，我首先得找到一块合适的地方，那儿既要有青草供山羊吃，又要有水供它们喝，并且还要有荫凉的地方供它们歇息。