tā / duì / bié / rén / de / kùn / nán / bù / zhī / tòng / yǎng / cóng / lái / bú / huì / zhǔ / dòng / bāng / máng

他对别人的困难不知痛痒，从来不会主动帮忙。

He is indifferent to other people's difficulties and never offers help on his own.