Usually photons don't interact with each other. With this scheme we may be able to achieve a long sought goal: strong interaction between photons, mediated by a single atom.

参与该实验的博士生 Martin Mücke说，“通常光子不会有相互作用，用这种方法我们也许达成了期待已久的目的：用一个原子作为介质，实现光子相互间的强烈作用。

youdao

Nuclear fusion - the melding of atomic nuclei that happens inside stars - is a long-sought goal on Earth.

核聚变是发生在恒星内部的原子核融合，是地球上长期追求的目标。

youdao

Further, Gaza would provide al Qaeda with the opportunity to directly strike Israel, a long sought goal.

CENTERFORSECURITYPOLICY: Don't make the same mistake twice