When an aluminum rivet is upset against a softer material, a washer must be used under the upset head to prevent eruption of the softer material.

当一个铝铆钉的镦头形成在较软的材料一边时，必需在铆钉镦头下使用垫片以防止较软材料胀裂。

youdao

Don't be upset because opportunity comes in different ways and if your head is down, you might not see it.

不要沮丧，因为机会以不同的方式出现，如果你低下头，就可能看不到它。

youdao

Inherited diseases, brain disorders associated with mental illness, and head injuries can all affect the way the brain works and upset the daily activities of the rest of the body.

遗传病，精神病相关的脑部失调和脑损伤都会对脑的正常运转有影响，并且扰乱身体其余部分的日常行动。

youdao

"Head teachers are very upset about the marking, " he said.

BBC: Head teachers complain of 'erratic' Sats marking

His appointment in 2006 to head a department staffed by trained diplomats upset many who had come to expect they would be led by one of their own.

ECONOMIST: Vatileaks

Wines of South Africa head Sue Birch told the BBC she was "upset" by the report, saying it lacked balance.

BBC: South Africa wine grown by 'abused' workers