Non - rigid airships commonly were called blimps.是什么意思？

Non - rigid airships commonly were called blimps.

非 硬式飞艇一般称做软式小飞艇.

Non

adv. 非，不；n. [法]反对票，投反对票的人；

例句
Above its doors was a Latin inscription: Non omnia possumus omnes...
门的上方刻有拉丁文铭“人非万能”。

rigid

adj. 严格的，僵硬的，（规则、方法等）死板的，刚硬的，顽固的；

例句
He balanced his budgets by rigid control over public expenditure.
他通过严格控制公共开支保持预算平衡。

airships

n. 飞艇，飞船（airship的复数形式）；

例句
The best airships were the giant Graf Zeppelin and the luxurious Hindenburg of the 1930 s.
最好的飞船是20世纪30年代特大的齐柏林号和豪华的兴登堡号.

commonly

adv. 通常地，一般地，平凡地，粗俗地；

例句
The disease is more commonly known as Mad Cow Disease...
这种疾病更通俗的名称是疯牛病。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

called

v. 叫( call的过去式和过去分词 )，通电话，认为，估计；

例句
He has also called for an acceleration of political reforms.
他同时呼吁加快政治改革的步伐。

blimps

n. 软式小型飞船，肥胖的人( blimp的名词复数 )；

例句
If they stop , the blimps switch to a doomsday program.
使得飞行船上的程式启动那该怎么办?