In view of the division of lithology, biostratigraphy and optimal partition of geochemical elements of the Permian-Triassic boundary strata, it is testified that the conodont Hindeodus parvus can be regarded as a biostratigraphic criterion of the lowest part of the Triassic and the Permian-Triassic boundary strata of this area is successiv.
本文以选部益哇沟剖面为例，对该区界线地层进行研究，从岩石地层划分、生物地层划分以及地球化学元素最优分割研究出发，确定了二叠、三叠系界线点，证明牙形石Ｈｉｎｄｅｏｄｕｓｐａｒｖｕｓ可作为三叠系开始的标志，并且二叠、三叠系是连续的。
As a rule this concerns only part of the whole terminator.
通常这只是影响地界线的一部分。
a boundary line between land and water.
陆地与海水的边界线。
The playing area is demarcated by a white line.
运动场地以白线为界.
the boundary line between two pieces of property.
两块所有地的边界线。
The space beyond a boundary or limit.
外界超过某个范围或界线的地方
The terminator is the boundary between day and night.
地影界线就是白天和黑夜的边界。
the division between my land and his
我的地和他的地的分界线
The boundaries are clearly laid off on the map.
地图上清楚地标出了界线。
The fence marks the boundary between my land and hers.
这道栅栏是我的地和她的地的分界线.
The fence mark the boundary between my land and hers.
这道栅栏是我的地和她的地的分界线。
RESEARCH OF PERMIAN-TRIASSIC BOUNDARY STRATA,IN WEST QINLING AREA
西秦岭地区二叠—三叠系界线地层研究
The apparent intersection of the earth and sky as seen by an observer.
地平线观察者所见之天地之间的明显交界线
Recording of Charts and Geographical coordinates Establishing Baselines and Limits of Maritime Zones
确定海区基线和界线的海图和地理坐标编录
Not all regions worldwide use loading coils.
并不是世界各地都使用负载线圈。
To flash news across the world by radio
用无线电迅速地把消息传到全世界。
a line that marks the side boundary of a playing field.
标明比赛场地侧面边界的线。
The lane is the boundary of our land.
那条小路就是我们这片地的界线.
Protection zones of all grades shall be indicated by clear geographic demarcations.
各级保护区应当有明确的地理界线。