But the big test is comparing these fitness watches to tried and true gold standard measurements tools.

但最大的考验是将这些健身手表与久经考验的真正黄金标准的测量工具进行比较。

By the 1950s, researchers were using placebos as a standard tool to test new treatments.

到 1950 年代，研究人员将安慰剂用作测试新疗法的标准工具。