Only electrons in the outer shell can form chemical bonds, so the elements in each column are chemically similar.

只有外层内的电子才会形成化学键，因此每一列中各元素化学性质均相似。

youdao

Shell Research Limited is sponsoring a Chair in Chemical Engineering at Tsinghua University to lead research into finding clean energy solutions for China.

壳牌研究有限公司将资助在清华大学化学工程系设立的一个讲席，领导为中国找寻清洁能源解决方案的研究工作。

youdao

Particulate of graphite electrode wastes from an electric-carbon materials factory was formed "core-shell" negative materials by chemical deposition coating with medium pitch.

以大功率石墨电极废品破碎后的微粒为“核”，以中温沥青为包覆原料，经化学沉积包覆形成“核-壳”型锂离子蓄电池负极材料。

youdao

Shell, Dole, and Dow Chemical submitted a brief to the court, urging it to side with Chevron.

NEWYORKER: Reversal of Fortune

Some of Shell's brightest longer-term gas prospects are in Saudi Arabia, where Shell has done business since the 1940s and helped build chemical plants.

FORBES: Companies, People, Ideas

The gauntlet's hard plastic shell is even roomy enough to add GPS equipment, biometrics, chemical sensors, or other embedded additions, as needed.

ENGADGET: BodyGuard stun-glove leaps out of comic books, into the arms of LA Sheriff's Department