The upper plate absorbs neutrons, and the lower plate reflects them.

上平板用于吸收中子，下板可以反弹它们。

youdao

A flexible construct (30) extends vertically from the upper plate to the lower plate.

一柔性结构(30)从上板垂直延伸至下板。

youdao

The device (10) includes a disc prothesis or artificial disc (12) having an upper plate (14) and a lower plate (16).

装置(10)包括一盘修复物或人工盘(12)，该盘修复物或人工盘(12)具有一上板(14)和一下板(16)。

youdao

The upper plate absorbs neutrons, and the lower plate reflects them.

BBC: Neutrons could test Newton's gravity and string theory

But eventually, each atom encounters a plate at a temperature lower than its boiling point, at which point it sticks to the plate, just as water freezes when poured on to dry-ice.

ECONOMIST: Nuclear waste

Can Israel afford to give up its own place in the lineup in the belief that the United States, hitting lower in the order, will actually go up to the plate and take its swings?

CNN: Obama's Iran problem and the Bush doctrine