top leaf中文什么意思

分层回采的上层

• top:    n. 陀螺。 The top sle ...
• leaf:    n. 〔英军俚〕休假。
• top leaf of spring:    顶簧片

例句与用法

1. At first , plants would turn dark green but soon the top leaves would progress through typical k symptoms to bronzing and leaf curl
   最初植株变得深绿，但很快上部叶片就会经历典型缺钾症状出现青铜症和卷叶。