1
the seeing of [something]
这种说法较为正式或书面，口语中更常用动名词直接带宾语，如 seeing the eclipse。
The seeing of a total solar eclipse is an unforgettable event.
观看日全食是一次难忘的经历。
看见；视力
seeings — plural of seeing
先理解核心含义，再看它在真实句子里的用法。
看见；视力
The act or fact of perceiving something with the eyes; eyesight.
The seeing of a total solar eclipse is an unforgettable event.
观看日全食是一次难忘的经历。
用眼睛感知某物的行为或事实；视力。
The act or fact of perceiving something with the eyes; eyesight.
由于地球大气湍流引起的望远镜图像的移动或扭曲。
The movement or distortion of a telescopic image as a result of turbulence in the Earth's atmosphere.
After the accident, his seeing was permanently impaired.
事故之后，他的视力永久性受损了。
The doctor tested her seeing by asking her to read an eye chart.
医生让她阅读视力表来测试她的视力。
Good seeing is essential for a pilot to perform their duties safely.
良好的视力对于飞行员安全执行职责至关重要。
这种说法较为正式或书面，口语中更常用动名词直接带宾语，如 seeing the eclipse。
The seeing of a total solar eclipse is an unforgettable event.
观看日全食是一次难忘的经历。
这里 seeing 是天文学术语，指大气湍流对望远镜成像质量的影响，通常为不可数名词。
Excellent seeing allowed us to photograph the planet's rings.
良好的视宁度使我们得以拍摄行星的光环。
Not this
At first seeing, I didn't recognize him.
Use this
At first sight, I didn't recognize him.
短语 at first sight 是固定搭配，表示“第一眼”；seeing 表示“看见”的动作或事实，不能替代 sight 用于该介词短语。
Not this
My seeing is very poor, so I need a pair of glasses.
Use this
My eyesight is very poor, so I need a pair of glasses.
表示“视力”时，英语习惯使用名词 eyesight（或 sight）；seeing 虽可作名词表示看见，但“视力不好”用 seeing 不符合英语搭配习惯。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
眼见为实；百闻不如一见
People often say seeing is believing, but not everything we see is true.
人们常说眼见为实，但我们看到的一切不一定都是真的。
良好视宁度（天文观测条件）
Astronomers hope for good seeing to take sharp images of the planets.
天文学家希望有良好的视宁度来拍摄清晰的行星图像。
差视宁度；不良观测条件
The observatory closed because of poor seeing that night.
由于那晚视宁度差，天文台关闭了。
大气视宁度
Atmospheric seeing determines how clearly stars appear through a telescope.
大气视宁度决定通过望远镜看到的星星有多清晰。
看的动作；视觉行为
The act of seeing is more complex than just recording an image.
看的动作比仅仅记录图像要复杂。
眼见为实；百闻不如一见
He told me the view from the top was amazing, and seeing is believing.
他告诉我山顶的景色很美，眼见为实。
眼见为实。
Seeing the project succeed made all the hard work worthwhile.
看到项目成功让所有的努力都值得了。
Use seeings naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
seeing 是 see（看）加 ing，把天文台的“视宁度”想象成“看星星时大气宁静、画面稳定”。
语域：formal 常见场景：formal writing、literary contexts、astronomy 作为名词时，“seeing”多用于书面语或专业语境，日常口语中较少使用；表示“视力/看见”时较正式，表示天文观测的“视宁度”则属于专业术语。
不可数名词
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.