However, the nucleons in nucleus will decay and baryon-number conservation may not be absolute according to the Grand unified theory.

而大统一理论则预言在原子核中的核子将衰变，重子数守恒将被破坏。

youdao

After training, all subjects received five posttest tasks: box task, transfer task, appearance-reality task, sources task and number conservation task.

训练后，被试接受5种后测任务：盒子任务、转移任务、外表-事实任务、来源任务和数量守恒任务。

youdao

The belief group was trained on two false belief tasks, the perception group was trained on two visual perspective-taking tasks, and the control group was trained on two number conservation tasks.

信念组训练两个误信念任务，知觉组训练两个视觉观点采择任务，控制组训练两个数量守恒任务。

youdao

Mulroy has initiated a number of conservation campaigns aimed at that overuse as well.

NPR: Stakes High for Las Vegas Water Czar

Because this feature is a proven energy-saver, customers qualify for a number of conservation rebates.

CNN: Nest's plan to stop brownouts before they start

There is a vaccine for badgers - the BCG jab, which has been used by a number of wildlife and conservation bodies in England, including the Gloucestershire Wildlife Trust, the RSPB, the Wildfowl and Wetlands Trust and the National Trust.

BBC: Q&A: The badger cull