He took three steps backwardly.

他倒退了三步。

youdao

Can you say the alphabet backwardly?

你能倒著念字母表吗？

youdao

While most 2.0-compatible drives are backwardly compatible with 1.1, it is generally advisable to avoid using 1.1 unless there is no other option (due to its slow speed).

虽然大多数兼容2.0的驱动器都可向后兼容1.1，但是一般最好避免使用1.1，除非别无选择(因为它的速度比较慢)。

youdao

The new USB 3.0 bus-powered portable hard drive is backwardly compatible with USB 2.0 ports, ensuring that all of the user's content is completely accessible.

ENGADGET: Verbatim's USB 3.0 Store 'n' Go external drives play nice with magnets, your data