1、necessary

必要的;必需的

I kept the engine running because it might be necessary to leave fast.

我沒讓發動機熄火，因為也許需要迅速離開f,HS@TkDG^qi75。

We will do whatever is necessary to stop them.

我們要采取一切必要措施去阻止他們fmtivXx7SHH。

(結果或聯系)必然的，勢必的

Wastage was no doubt a necessary consequence of war.

巨大的損耗無疑是戰爭的必然結果vzBN.k&MJpTH[eEHj_。

Scientific work is differentiated from art by its necessary connection with the idea of progress.

科學工作與藝術的區別在于它與人類進步有著必然聯系U;[urFrT3Z;t0uA。

如果必要的話

If necessary, the airship can stay up there for days to keep out of danger.

必要時，飛艇能在那里停留數天以躲避危險WdrL8Vj#w!Q2yQsXQL*_。

The army needs men who are willing to fight, when necessary.

軍隊需要在必要時愿意投入戰斗的軍人&Q%wD*Xfc,l。

2、ignite

點燃;(使)燃燒;著火

The bombs ignited a fire which destroyed some 60 houses.

炸彈引發的大火燒毀了大約 60 棟房屋rsX%44_AOXiUHshc!。

The blasts were caused by pockets of methane gas that ignited.

爆炸是由甲烷氣囊被引燃造成的zC]v_ddG]t_。

激起;使激動

There was one teacher who really ignited my interest in words.

曾經有一位老師真正激起了我對文字的興趣rTNlQ#SVp4Jk(tcyTf。

The recent fighting in the area could ignite regional passions far beyond the borders.

最近該地區的戰斗可能激發邊境以外整個地區的激動情緒MmOs@C7~o9m|5TwX3Sw^。