The main problem with spot sampling being that it is not collected during entire bunkering process but only represent the fuel supplied in a short sequence of time.

局部取样被认为是不可取的，因为它无法提供要求的代表性油样。局部取样的问题在于如此取来的油样只能代表该时段的油质，而不是整个所加装燃油的油质。

youdao

He introduced me to his son, who received me civilly, gave me a breakfast, but told me he did not at present want a hand, being lately supplied with one;

他把我引见给他的儿子，他儿子礼貌地接待了我，招呼我吃了早茶，但却对我说目前不需要帮手，因为刚找了一个；

youdao

Claims that emergency services are being supplied with fuel are simply not good enough.

BBC: You are in: Health