in a lower place than something
The cat hid under the bed.
貓躲在床底下。
covered by something
The treasure was buried under the sand.
寶藏被埋在沙子下面。
less than a number or amount
Children under five get in free.
五歲以下的兒童免費入場。
affected by something
The bridge broke under the heavy weight.
橋在重壓下斷裂了。
controlled by someone
The team worked under a new manager.
團隊在新經理的領導下工作。
according to a rule or agreement
Under the rules, you must wear a helmet.
根據規定,你必須戴頭盔。
being examined or studied
The plan is under review by the committee.
該計劃正在由委員會審查中。
using a different name
He wrote under a pen name.
他用筆名寫作。
in a particular section or category
Look under 'sports' in the index.
在索引中查找「體育」類別。
in a lower place
The dog went under to get out of the rain.
狗躲到下面避雨。
below water
The submarine went under to avoid detection.
潛艇潛入水下以避免被發現。
less than
Tickets are ten dollars or under.
票價十美元或以下。
into sleep or unconsciousness
The patient went under for surgery.
病人進入麻醉狀態進行手術。
lower or bottom
Check the under side of the car for damage.
檢查汽車底部是否有損壞。