You should ensure against loss of heat by having double glazing.

你應裝雙層玻璃以免散熱。

There must be safety devices to ensure workers against accidents.

一定要有保護工人避免工傷事故的安全裝置。

Vaccinations ensure one against diseases.

接種可以預防疾病。

We must ensure our children against contamination by bad ideas.

我們必須保護我們的兒童不受壞思想的侵蝕。

Carefulness ensures you against errors.

工作仔細可使你不出差錯。

Proper clothing ensured us against suffering from the cold.

衣服穿得合適,我們就不會挨凍。

No one can ensure you from failure.

沒有人能保證你不會失敗。