And second-hand smoke is still an issue; exhaled particles from vaporizers known as" ultrafine particles" are known to affect pulmonary health.

二手烟仍然是个问题；从蒸发器中呼出“超细颗粒”会影响肺部健康。

The culprit used an ultrafine instrument that left no trace on the packaging, making it impossible to determine which products were compromised.

罪魁祸首使用了超工具，所以包装上没任何痕迹，这使得你法断哪些产品被下了毒。

Aiming those at the synapse under study enabled them to uncage the neurotransmitter and see, by measuring the electrical activity in that part of the neuron using an ultrafine electrode, whether the synapse responded.

将研究突触作为目标能够让这些突触释放神经递质，并让研究人员能够使用超细电极测量神经元这一部分电活动，以此来观察突触是否有反应。