Retardation

[ [ˌritɑr'deʃən] ]

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n. 迟延, 妨碍, 阻止\\n[化] 缓聚作用

✅ 同义词

holdup lag lagging lateness slowdown delay detainment retard

rapidity speed speeding speedup velocity celerity

retardation n[U] mental retardation 智力迟钝.

Mom.

妈妈。

He always plays hockey.

他通常去打曲棍球。

Fortunately, however, ancient men made tools of stone, especially flint,

然而，幸运的是，远古人用石头制作了工具，特别是用燧石，

更多情景英语 ›

radiation frequency spectrum

ranching ræntʃ, rɑ:ntʃ

recreational vehicle

reference style

rejoining

reproval

Revilliod's sign

rhusin