doc: add en doc

README_en.md

@@ -62,6 +62,14 @@ Quick experience of **P**ractical **U**ltra **L**ight-weight image **C**lassific
   - [PULC Quick Start](docs/en/PULC/PULC_quickstart_en.md)
   - [PULC Model Zoo](docs/en/PULC/PULC_model_list_en.md)
     - [PULC Classification Model of Someone or Nobody](docs/en/PULC/PULC_person_exists_en.md)
+    - [PULC Classification Model of Person Attribute](docs/en/PULC/PULC_person_attribute_en.md)
+    - [PULC Classification Model of Wearing or Unwearing Safety Helmet](docs/en/PULC/PULC_safety_helmet_en.md)
+    - [PULC Classification Model of Traffic Sing](docs/en/PULC/PULC_traffic_sign_en.md)
+    - [PULC Classification Model of Vehicle Attribute](docs/en/PULC/PULC_vehicle_attribute_en.md)
+    - [PULC Classification Model of Containing or Uncontaining Car](docs/en/PULC/PULC_car_exists_en.md)
+    - [PULC Classification Model of Text Image Orientation](docs/en/PULC/PULC_text_image_orientation_en.md)
+    - [PULC Classification Model of Textline Orientation](docs/en/PULC/PULC_textline_orientation_en.md)
+    - [PULC Classification Model of Language](docs/en/PULC/PULC_language_classification_en.md)
 - [Quick Start of Recognition](./docs/en/tutorials/quick_start_recognition_en.md)
 - [Quick Start of Recognition](./docs/en/quick_start/quick_start_recognition_en.md)
 - [Introduction to Image Recognition Systems](#Introduction_to_Image_Recognition_Systems)

docs/en/PULC/PULC_person_exists_en.md

@@ -390,7 +390,7 @@ Return the directory `deploy`:
 cd ../
 ```
 
-Run the following command to classify whether there are human in the image `./images/PULC/person_exists/objects365_02035329.jpg`.
+Run the following command to classify whether there are humans in the image `./images/PULC/person_exists/objects365_02035329.jpg`.
 
 ```shell
 # Use the following command to predict with GPU.

docs/en/PULC/PULC_traffic_sign_en.md

@@ -182,7 +182,6 @@ Some image of the processed dataset is as follows:
 
 You can also download the data processed directly. And the process script file `deal.py` is also included.
 
-
 ```
 cd path_to_PaddleClas
 ```

docs/zh_CN/PULC/PULC_car_exists.md

@@ -150,7 +150,7 @@ print(next(result))
 
 #### 3.2.1 数据集来源
 
-本案例中所使用的所有数据集均为开源数据，`train`和`val` 集合均为[Objects365 数据](https://www.objects365.org/overview.html)的训练集的子集，`ImageNet_val` 为[ImageNet-1k 数据](https://www.image-net.org/)的验证集。
+本案例中所使用的所有数据集均为开源数据，`train`和`val` 集合均为[Objects365 数据](https://www.objects365.org/overview.html)的子集，`ImageNet_val` 为[ImageNet-1k 数据](https://www.image-net.org/)的验证集。
 
 <a name="3.2.2"></a>