painlessly

基本解释

The needles painlessly puncture the skin, but do not go through it.
針頭會毫無痛覺地刺進皮膚，但不會刺穿。
Apparently, designers try help users to get the signing procedure as quickly and painlessly as possible.
顯然地，設計師試圖幫助用戶盡可能快速和無痛苦地完成注冊流程。
blog.sina.com.cn
Competition and new technology often bring down prices for services like cable, telephone and Internet--giving us an opportunity to cut monthly budget expenses painlessly.
競爭以及新的科技經常會給電眡，電話，網絡這樣的服務行業帶來降價，這就提供給我們每月可以毫無痛苦地節省開支的機會。

The truck hits you,you die,painlessly and immediately.
卡車撞到了你，你在無痛中立即死亡。
耶魯公開課 - 死亡課程節選

The opening five minutes of the first round saw Watson run the board quickly and painlessly.
FORBES: On First Night Watson Went From Fearsome to Flummoxed To First
Most animals are killed (painlessly) when the research they are being used for is finished.
ECONOMIST: Animal rights extremists
Yet the notion that motorists can be persuaded painlessly to switch to public transport is bogus.
ECONOMIST: Traffic