Meaning of zhēng:
争
to strive for; to vie for; to argue or debate
Tāmen zǒng shì wèile dì yī míng ér zhēng.
他们总是为了第一名而争。
They always strive for the first place.
Liǎng gè háizi zài wèi yī kuài qiǎokèlì ér zhēng.
两个孩子在为一块巧克力而争。
The two children are vying for a piece of chocolate.
Tāmen wèi zhè ge wèntí jìnxíngle jīliè de zhēnglùn.
他们为这个问题进行了激烈的争论。
They had a heated argument over this issue.
deficient or lacking (dialect)
Tā de dá'àn lǐ yǒuxiē ràng wǒ gǎndào zhēng de dìfāng.
他的答案里有些让我感到争的地方。
There are some points in his answer that make me feel it's deficient.
how or what (literary)
Xiōngdì liǎ wèile yīgè wánjù ér hùxiāng zhēngdòu.
兄弟俩为了一个玩具而互相争斗。
The two brothers fought over a toy.