The keys are inside the drawer.（钥匙在抽屉里面。）

She felt a strange sensation inside her body.（她感觉身体里面有一种奇怪的感觉。）

We should stay inside when it's raining heavily.（雨下得很大的时候我们应该待在室内。）

The children are playing inside the house.（孩子们在房子里面玩耍。）

There is a beautiful garden inside the castle walls.（城墙里面有一个美丽的花园。）

He put the letter inside the envelope and sealed it.（他把信放进信封里然后封好。）

The box was so heavy that I couldn't lift it to see what was inside.（箱子太重了，我举不起来看里面有什么。）

Inside the museum, there are many precious artworks.（博物馆里面有许多珍贵的艺术品。）

They found a hidden room inside the old building.（他们在那座旧建筑里面发现了一个隐藏的房间。）

The dog likes to sleep inside its kennel.（这只狗喜欢睡在它的狗窝里。）

I can hear the sound of water flowing inside the pipe.（我能听到水管里面水流的声音。）

Look inside the book and you'll find some interesting pictures.（看看书里面，你会发现一些有趣的图片。）

The temperature inside the greenhouse is carefully controlled.（温室里面的温度被精确控制着。）

She opened the box and peeked inside.（她打开盒子往里面偷看。）

There's a surprise waiting for you inside the package.（包裹里面有一个惊喜等着你。）

The firemen rushed inside the burning building to save people.（消防员冲进着火的大楼里面救人。）

We need to clean the dirt inside the car.（我们需要清理汽车里面的污垢。）

The seeds are safely stored inside the pod.（种子安全地储存在豆荚里面。）

He felt a warmth spreading inside his heart when he saw her smile.（当他看到她的笑容时，他感到一股暖流在心中蔓延。）

The treasure is buried deep inside the cave.（宝藏深埋在洞穴里面。

）