When they cannot see the sun, they use some special way to sense direction from the earth's magnetic field.
看不见太阳时，它们会依据地球的磁场采用某种特殊的方法来感知方向。
Good safety sense, quality sense, and management in field.
良好的安全意识，质量意识，较强的动手和现场管理能力。
Experts in the field said the results had confirmed common sense.
在该领域的专家说，这一结果已证实是常识。
Experts in the field said the results had confirmed common sense.
在该领域的专家说，这一结果已证实是常识。
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