ign="center">Feature</th>
									<th style="width:25%;" vertical-align=" middle">Usage</th>
   									<th style="width:50%;">Interface</th>
   									</tr>
  									<tr>
    									<td>Sign-to-Text & Audio </td>
									<td>1.Automatically translate sign language to text in real-time meeting<br>2.Alternate input methods<br> => deafs can interact with normal people with their most familiar language , ie. sign language. </td>
    									<td ><video src="video/chat record.mp4"  controls="co