Voice activation is perfect for placing a call; opening the flip lid on a phone is probably the most effective way of answering it (or again using voice activation for hands-free use).

• 语音激活来打电话就非常理想，打开翻盖手机的盖子来接电话无疑也是最有效的接电话的方式之一，或者用语音激活免提功能。