Lower concentrations can damage engines without having an immediate effect on how well they work.
较低浓度的尘埃会损坏引擎，却不会当即彻底地影响其运行。
The drug had an immediate effect on the pain.
这药对止痛能立刻生效。
The medicine has an immediate effect on the pain.
这药对疼痛立即生效。
The drug has had an immediate effect on the patient.
此药立刻对病人产生了效果。
The drug has had an immediate effect on the patient.
此药立刻对病人产生了效果。
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