5 sentences

1. 窗台上摆着几盆花。

   chuāng​tái shàng bǎi zhe jǐ pén huā.

   There are several pots of flowers on the windowsill.

   Source: Dong Chinese Dictionary

2. 他两手扒着窗台向上爬。

   tā liǎng shǒu bā zhe chuāng​tái xiàng shàng pá.

   He climbed up by clutching the windowsill with both hands.

   Source: Dong Chinese Dictionary

3. 沙尘暴过后，窗台上落满了沙尘。

   shā​chén​bào guò hòu, chuāng​tái shàng luò mǎn le shā​chén.

   After the sandstorm, the windowsill was covered in dust and sand.

   Source: Dong Chinese Dictionary

4. 他们约定好以窗台上的花盆作为暗号。

   tā​men yuē​dìng​hǎo yǐ chuāng​tái shàng de huā​pén zuò​wéi àn​hào.

   They agreed to use the flowerpot on the windowsill as a signal.

   Source: Dong Chinese Dictionary

5. 窗台上的那盆花在阳光下开得非常灿烂。

   chuāng​tái shàng de nà pén huā zài yáng​guāng xià kāi de fēi​cháng càn​làn.

   The potted flower on the windowsill is blooming brilliantly in the sunlight.

   Source: Dong Chinese Dictionary