Number + 码
码 (mǎ) can mean "yard" (a unit of measurement) or "code" depending on context. As a measure word for distance, it appears after a number, and as part of compound words like 密码 (password), it refers to a code or number sequence.
他从三十码外踢进了一个漂亮的球。
Tā cóng sānshí mǎ wài tī jìn le yí gè piàoliang de qiú.
He kicked in a beautiful goal from thirty yards out.
请输入你的验证码。
Qǐng shūrù nǐ de yànzhèngmǎ.
Please enter your verification code.
这个密码太简单了,你应该换一个。
Zhège mìmǎ tài jiǎndān le, nǐ yīnggāi huàn yí gè.
This password is too simple; you should change it.
他从三十码外踢进了一个漂亮的球。
tā cóng sānshí mǎ wài tī jìn le yī gè piàoliang de qiú.
He kicked in a beautiful goal from thirty yards out.
请输入你的验证码。
qǐng shūrù nǐ de yànzhèngmǎ.
Please enter your verification code.
这个密码太简单了,你应该换一个。
zhège mìmǎ tài jiǎndān le, nǐ yīnggāi huàn yī gè.
This password is too simple; you should change it.