老师画了一张图展示血液如何流经心脏。

The teacher drew a ___diagram showing how the blood flows through the heart.

第一张图告诉我们，从1985年到1990年，日本游客出国旅行的数量从大约500万急剧增加到大约1100万。

The first ___diagram tells us that the number of Japanese tourists travelling abroad increased dramatically from about 5 million in 1985 to about 11 million in 1990.

这张图清晰地解释了光合作用的过程。

The ___diagram clearly explains the process of photosynthesis.