As easy as pie
There are many similes in English that have the form 'as X as Y'. These almost always highlight some property - X, and give an example of something that is well-known to display that property - Y. For example, 'as white as snow', 'as dead as a dodo' and, risking a group slander action from our noble friends, 'as drunk as a lord'.
lax Show phonetics
adjective ━━ a. ゆるんだ; 不注意な; しまりのない; （規則・躾(しつけ)などが）手ぬるい; （行状が）だらしのない; あいまいな; 【音声】弛緩(しかん)音の; 下痢の.
lacking care, attention or control; not severe or strong enough:
He took a gun through baggage control to highlight the lax security.
The subcommittee contends that the authorities were lax in investigating most of the cases.
A French probe into Société Générale's rogue-trading scandal is expected to report today that the bank's controls were too lax.
laxity Show phonetics
noun [U] (ALSO laxness)
highlight：使顯著、強調。例句：His speech highlighted the need for educational reform.（他的演講強調了教育改革的必要性。）
highlight (EMPHASIZE) Show phonetics
to attract attention to or emphasize something important:
The report highlights the need for improved safety.
The spelling mistakes in the text had been highlighted in green.