extend

• vt. 延伸；扩大；推广；伸出；给予；使竭尽全力；对…估价
• vi. 延伸；扩大；伸展；使疏开

ex-, 向外。-tend, 延伸，词源同tend, tense.

extend

extend: [14] Etymologically, to extend something is to ‘stretch it out’. The word comes from Latin extendere, a compound verb formed from the prefix ex- ‘out’ and tendere ‘stretch’ (source of English tend and tension and a wide range of derivatives, including contend, intend, and pretend). English standard derives from its Old French descendant estendre.
=> contend, intend, pretend, standard, tend, tension

extend (v.)

early 14c., "to value, assess," from Anglo-French estendre (late 13c.), Old French estendre "stretch out, extend, increase," transitive and intransitive (Modern French étendre), from Latin extendere "stretch out, spread out; increase, enlarge, prolong, continue," from ex- "out" (see ex-) + tendere "to stretch" (see tenet).

Original sense in English is obsolete. From late 14c. as "lengthen or extend in time," also "straighten" (an arm, wing. etc.). Meaning "make longer and/or broader in space" is from early 15c., as is intransitive sense of "cover an area, have a certain extent in space;" sense of "expand, grow distended" is from 1753. Related: Extended; extending.

1. The new territory would extend over one-fifth of Canada's land mass.

这块新领土将会使加拿大陆地面积扩展1/5以上。

来自柯林斯例句

2. This year they have introduced three new products to extend their range.

今年他们发布了3种新产品，以扩大产品范围。

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3. It might be possible to extend the technique to other crop plants.

也许可以将这种技术应用于其他农作物。

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4. The high-speed train service is planned to extend from Paris to Bordeaux.

高铁拟从巴黎延伸至波尔多。

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5. The caves extend for some 18 kilo-metres.

那些洞穴深约18公里。

来自柯林斯例句