be lost in

• 忘乎所以, 全神贯注于

be lost in的用法和样例：

例句

1. The old man was lost in thought and did not hear us come in.
   这个老人凝神沉思，没有听见我们进来。
2. Much of the goodness in food may be lost in cooking.
   食物在烹调中可能失去许多养分。