ca
ca — 縮寫
1. the standard short written form for the US state of California, used in mailing
加州縮寫
美國加州的州名縮寫
the standard short written form for the US state of California, used in mailing addresses, maps, weather reports, and other space-saving labels.
Please send the contract to Sacramento, CA 95814 by courier.
請用快遞把合約寄到加州沙加緬度 CA 95814。
[city], CA [zip] in a mailing address
Wildfire warnings were issued across northern CA after the storm.
暴風雨過後，CA 北部多地發布了野火警報。
CA as state shorthand in news and weather
The conference badge lists Elena's office as San Jose, CA.
會議名牌上寫著 Elena 的辦公室在 San Jose，CA。
A film crew drove from Nevada into CA before sunrise.
一個電影攝影隊在日出前從內華達開進了 CA 境內。
The parcel tracker still shows the package in Fresno, CA.
包裹追蹤頁面仍顯示貨件在 Fresno，CA。
- California
the full state name, used in speech and normal prose
- Calif.
an older written abbreviation; less standard than the postal form CA
文法句型
[city], CA [zip]
northern CA
in CA
用法筆記
Usually written in capitals without periods in modern US postal style. It normally appears after a California city name or in short regional labels, not in ordinary running prose where the full name 'California' is more natural.
常見錯誤
ca — 符號
1. the chemical symbol for calcium, an element found in bones, teeth, and many food
鈣符號
化學元素鈣的符號
the chemical symbol for calcium, an element found in bones, teeth, and many foods, shown as 'Ca' in formulas, lab reports, and the periodic table.
Hui circled Ca on the periodic table before the quiz.
Hui 在小考前把元素週期表上的 Ca 圈了起來。
Ca as a periodic-table symbol
The blood test report marked Ca as slightly below normal.
血液檢驗報告把 Ca 標成略低於正常值。
Ca in a medical lab report
The fertilizer label lists Ca beside magnesium and sulfur.
肥料標籤把 Ca 列在鎂和硫旁邊。
Students learned that Ca stands for calcium in chemistry class.
學生們在化學課上學到 Ca 代表鈣。
Karim wrote Ca beside the word calcium in his lab notebook.
Karim 在實驗筆記中把 Ca 寫在 calcium 旁邊。
- calcium
the full element name, used in speech and general writing
文法句型
Ca on the periodic table
Ca level
Ca in a formula
用法筆記
Always written with a capital C and a lowercase a. Use this form in chemistry and nutrition contexts; the full word 'calcium' is more natural in ordinary speech and non-technical writing.