extended是什么意思

adj. 延伸的；扩大的；长期的；广大的

v. 延长；扩充（extend的过去分词）

英文词源

extended (adj.): mid-15c., "occupying time, made longer," past participle adjective from extend (v.). Meaning "stretched out" in space is from 1550s; extended-play (adj.), in reference to recordings (especially 7-inch, 45 rpm vinyl records) is from 1953; in reference to pinball games by 1943. Extended family (n.) in sociology recorded from 1942.
A challenging question was asked RCA engineers and scientists in 1951. How can we increase the playing time of a 7-inch record, without using a larger disc? Sixteen months of research gave the answer, "45 EP"--Extended Play. [Radio Corporation of America magazine advertisement, May 1953]

1. ex- "out" + tend- + -ed.2. 含义：stretch out, lengthen.

1. Parallel lines will never meet no matter how far extended.: 无论延伸多长，平行线永不相交。

2. Loans were extended to help pay the interest on the old ones.: 这些贷款延期偿还以支付旧账利息。

3. The training covers extended periods in obstetrics and gynaecology.: 该培训包括产科学和妇科学的增加课时。

4. The trough of low pressure extended over about 1000 kilometres.: 低压槽延伸约1,000公里。