English Coach

surveillance 監視、見張り

close observation, especially of a suspected spy or criminal.

You need surveillance.

authenticity 真正である事、確実性

the quality of being real or true

It is difficult to prove authenticity.

〜を犠牲にして at the expense of ~

She works hard at the expene of her free time.

栄養がある nutritious

efficient as food, nourishing

I eat nutritious foods everyday.

sanitation 公衆衛生、衛生設備、下水設備

conditions relating to public health, especially the provision of clean drinking water and adequate sewage disposal.

sewage : 下水、汚水
waste water and excrement conveyed in sewers.


Japan has good sanitation inflastructure.

germs 細菌、ばい菌

micro-organism, especially one which causes disease.

This sheet protects injury from germs.

swear by 〜を絶対に信頼する、〜にかけて誓う

to believe strongly that something is effective or useful

I swear by the power of enzyme including Japanese radish.

swear by 〜を絶対に信頼する、〜にかけて誓う

to believe strongly that something is effective or useful

I swear by the power of enzyme including Japanese radish.

unwind （他動詞）をほどく、緩める　（自動詞）ほどける、くつろぐ

undo or be undone after winding or being wound

relax after a period of work or tension.


The dentist unwinds the tissue between gum and a tooth before pick out the tooth.

無理して ~しなくていいよ　you do not need to force yourself to do

You do not need to force yourself to speak in Japanese. Please speak in English.