Destructive techniques are techniques in which the sample is decomposed by a reagent and then the concentration of the element in the aqueous extract determined by a physical technique.

破坏性技术是将样本溶解于溶剂，然后通过物理方法分析元素浓度的技术。

youdao

But physical technique, Robbins pointed out, is merely a tool.

NEWYORKER: A Pickpocket��s Tale

Swansea midfielder Joe Allen has benefited more than most from Martinez's preferred style of play, where sound technique takes precedent over physical attributes.

BBC: Swansea warn clubs over Martinez

Packet switching got its name thanks to late British scientist Donald Davies who was creating a network that used this technique at the National Physical Laboratory (NPL).

BBC: Celebrating 40 years of the net