... flatten ground with an upward slope 平整一个向上的斜坡 lower ground level 使地面水平变低 observe 观察地面水平高度 ...
基于1个网页-相关网页
The stair width ranges from 2 meters on the lower ground level (wide enough to sit), to 20 centimeters at roof level (the height at which only animals can perch).
楼梯的宽度范围是从较低地面上足够坐的宽度2米到屋顶处只有动物可以栖息的20厘米宽度。
A fall is defined as an event which results in a person coming to rest inadvertently on the ground or floor or other lower level.
跌倒的定义为使人不慎跌倒在地面或地板或其他地面较低的地方的事故。
The relatively low-level cumulus clouds (below 15,000 feet) shown in this image are likely the product of moisture near ground level being cooked by the Sun and convected into the lower atmosphere.
上图中，相对较低的积云（低于4500米）很可能是地面附近的水汽受太阳辐射，与低层大气发生对流所形成的。
应用推荐