Fortunately, however, ancient men made tools of stone, especially flint, because this is easier to shape than other kinds.
然而，幸运的是古人类用石头制造工具，尤其是燧石，因为石头比其他物质更容易成形。
Fortunately ancient man flint easier to shape Fortunately, however, ancient men made tools of stone, especially flint, because this is easier to shape than other kinds.
然而，幸运的是，远古人用石头制作了工具，特别是用燧石，因力燧石较之其他石头更易成形。
Compared with GTD, this method is easier to deal with when the antenna reflector has complicated cross section shape.
与GTD法相比，该方法更易处理具有复杂截面形状的反射体天线。
Compared with GTD, this method is easier to deal with when the antenna reflector has complicated cross section shape.
与GTD法相比，该方法更易处理具有复杂截面形状的反射体天线。
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