The French foreign minister1 says2 never before has France recalled its U.S. ambassador3, but says4 it's justified by the seriousness of Australia pulling out of a conventional submarine deal with France and switching to U.S. nuclear power technology5.

长难句解析

1主语，2&4谓语，3&5宾语从句

宾语从句3是倒装句，顺序为"France has never recalled ... before"

宾语从句5中，it是形式主语，后面的"pulling out ... power technology"是真正主语，调整为顺序即为"pulling out ... is justified by ... Australia"。

重点词汇词组

1.pull out of

①退出

France was going to pull out of NATO.

法国准备退出北大西洋公约组织。

②摆脱……困境；由……康复

I pulled out of the depression very quickly with treatment.

经过治疗，我很快就摆脱了抑郁症。

2.switch to 切换到；转到；转变成

It's so confusing switching to a new system.

转换到新系统令人很困惑。

【相关短语】

switch on 接通，开启

switch off 关掉；切断

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