In some situations where Backwards Compatibility mode is in effect, the first member of a sequence will be taken when an atomic value is needed.
在一些向后兼容方式有效的情况下，如果需要原子值，那么将选取序列的第一个成员。
When the argument has more than one member, either function normally raises an error, but fn: string (seq) will not raise an error when Backwards Compatibility mode is in effect.
如果参数有多个成员，通常情况下两者都将引发错误，但是如果采用了向后兼容方式，则fn：string (seq)不会造成错误。
Ordinarily, this is a low-pressure area which has the effect of sucking the truck backwards, something that adds to the rig's fuel consumption.
通常情况下，车后区域空气压力很低，对卡车会产生一个向后的吸引力，增加燃油的消耗。
The pulse was drift backwards nonlinear by the self-frequency shift effect.
效应 使飞秒脉冲向后沿非线性漂移。
The pulse was drift backwards nonlinear by the self-frequency shift effect.
效应 使飞秒脉冲向后沿非线性漂移。
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