我暂时做个小小的结论：
物书堂cobuild 9/10 两版对比，区别是（价格翻倍、词头未增加、删去性别限定描述）。
cobuild价格表：
| 版本 | 原价 | 促销价 | 发布日期 |
|---|---|---|---|
| 第9版 | 2,320日元 | 1,220日元 | 2020年4月7日 |
| 第10版 | 5,000日元 | 3,600日元 | 2024年4月16日 |
collins cobuild 9 （2020）
https://twitter.com/monokakido/status/1247380336113115136?s=46
物書堂（ものかきどう）@monokakido
「辞書 by 物書堂」版「コウビルド英英辞典（第9版）」をリリースしました。「春のセール」期間中は2,320円→1,220円で販売いたします。
第8版をお持ちの方は無料でアップデートできます。
どうぞよろしくお願いいたします。
コウビルド英英辞典（第9版）
12:27 pm · 7 Apr 2020
collins cobuild 10 （2024）
https://twitter.com/monokakido/status/1780075397109223924?s=46
物書堂（ものかきどう）@monokakido
「辞書 by 物書堂」版「コウビルド英英辞典（第10版）」をリリースしました。
45億語のCOBUILDコーパスを活用した中上級者向けの学習英英辞典です。
2024年5月7日まで5,000円→3,600円で販売いたします。
コウビルド英英辞典（第10版）
11:27 am · 16 Apr 2024
内容修订细节。择一词头对比：skirt
图片展示
文字展示
cobuild 10版，词头：skirt
skirt /skɜːʳt [AUDIO]/ (skirts [AUDIO], skirting [AUDIO], skirted [AUDIO])
N-COUNT
A skirt is a piece of clothing that fastens at the waist and hangs down around the legs.
VERB
Something that skirts an area is situated around the edge of it.
• [V n] We raced across a large field that skirted the slope of a hill. VERB
If you skirt something, you go around the edge of it.
• [V n] We shall be skirting the island on our way.
• [V + round/around] She skirted round the edge of the room to the door. VERB
If you skirt a problem or question, you avoid dealing with it.
• [V n] He skirted the hardest issues, concentrating on areas of possible agreement.
• [V + round/around] He skirted round his main differences with her.
cobuild 9版，词头：skirt
skirt /skɜːʳt [AUDIO]/ (skirts [AUDIO], skirting [AUDIO], skirted [AUDIO])
N-COUNT
A skirt is a piece of clothing worn by women and girls. It fastens at the waist and hangs down around the legs.
VERB
Something that skirts an area is situated around the edge of it.
▶ We raced across a large field that skirted the slope of a hill. [V n]
VERB If you skirt something, you go around the edge of it.
▶ We shall be skirting the island on our way. [V n]
▶ She skirted round the edge of the room to the door. [V + round/around]
VERB If you skirt a problem or question, you avoid dealing with it.
▶ He skirted the hardest issues, concentrating on areas of possible agreement. [V n]
▶ He skirted round his main differences with her. [V + round/around]