Whenever feasible, engineering controls should be applied first. However engineering controls are not always practical or do not effectively reduce noise to acceptable levels. In this case personal hearing protection is needed.
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Use library functions whenever feasible.
在任何可行的时机使用函数库。
Whenever feasible this should be done as soon as possible with a CT scan.
每当这应该是可行的,尽快完成了一个CT扫描。
Whenever feasible, ossicular reconstruction was performed at the time of the initial surgical procedure.
只要条件适宜,均在初次外科手术中同时进行听骨链重建。
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