将“painless"翻译成中文

Buruli ulcer often starts as a painless swelling (nodule).

布鲁里溃疡开始时通常为一个无痛肿块,称为结节。

Swallowing pills is the most effective and painless way of delivering any medication in the body.

口服是最为有效且无痛的给药方式。 口服是最为有效且无痛的给药方式。

Buruli ulcer often starts as a painless swelling (nodule).

布鲁里溃疡开始时通常为一个无痛肿块,称为结节。